Environmental Monitoring & Process Validation Specialists

Cherwell Laboratories was founded by Lawrence Whittard in 1971 as a veterinary diagnostic laboratory.

Lawrence photo

Lawrence was an entrepreneur and had an eye for an opportunity. Cherwell evolved and became a distributor for a range of laboratory equipment. A focus on microbiology, and particularly within the pharma sector, set the foundations for the business

Today, Cherwell is a specialist supplier of ‘cleanroom microbiology solutions’ with products for environmental monitoring and process validation for healthcare, pharmaceutical and industrial applications.


From our site in Bicester, we manufacture Redipor® Prepared Media, our own range of microbiological media products which has been developed to meet the specific needs of our customers.

We also supply SAS® and ImpactAir®  microbial air samplers and monitors, as well as a range of EM accessories.

Our Ethos

Cherwell focuses on supplying high quality and bespoke products supported by excellent customer service.

This ethos is fundamental to our values as a family business and helped us achieve ISO9001:2015 accreditation for:

the manufacture and supply of microbiological media. Supply, service and calibration of viable air sampling equipment. Distribution and sales of laboratory equipment and consumables’.

For further information on our ISO9001:2015 accreditation please download our current Quality Management Certificate.


For environmental monitoring and process validation in pharmaceutical and associated industries


Every batch of prepared media is quality tested to the strictest standards and comes with full certification


Ensuring your environmental monitoring equipment is calibrated every six months


Settle plate stands, contact plate carriers, surface samplers and more. Bespoke options available on request.

What our customers say

Thomas Mullen, Quality Operations Specialist (QA)

MedPharm Ltd

"I met with representatives from Cherwell at the Cleanroom Technology Conference recently, and found them to be not only approachable and friendly, but also highly knowledgeable and able to help with a query I had on microbial monitoring of compressed air."

Julie Bowden, QA Releasing Officer

Pharmacy Manufacturing Unit, Portsmouth

"Friendly, helpful, efficient. Always get a prompt reply to any query. Always feel like a valued customer. Definitely feel like the company cares about it's customers and respects the industry we work in."

QA Pharmacist


"I contacted Cherwell in relation to getting an empty vial with a flip top lid for a planned process validation. The person dealing with my request could not have been more helpful and really went the extra mile in helping me to get the product I needed."

Microbiology Team Leader

Industrial Pharmaceutical Company

"Staff are always quick to respond and try to help as much as possible within the scope of their own knowledge/ability. If they are unable to help, they will always forward the query onto someone who can."

Quality Manager

BioDivide Ltd

"Great customer service and always keeping our company informed of changes particularly concerning regulatory matters that could impact us. Helpful, friendly, efficient."

National Blood Service


"Your service has always been very good, as well as your documentation. Quite a lot of companies you have to chase these days for deliveries and certificates. You always send them promptly."

Technical and Regulatory Affairs Manager

Cleaning Products Supplier

"Thank you! Once again – great service! Goods received within 2 days of ordering and all packaging intact, CoAs received same day."


Industrial Pharmaceutical Company

"Service from Cherwell is outstanding. The equipment is extremely reliable. That's what we ask for."

Kieran Broadbridge, Senior Project Leader


"Hassle free. Quality product. Minimal QC issues with good communication when they do occur."

Senior Microbiologist

Pharmaceutical CMO

"Super service - when we had an issue with our existing supplier of Contact Plates - you've stepped in and now we're going with you for this product."

Jane Maffei, Lead Technician in Aseptic Services

Worcestershire Acute Hospitals NHS Trust

"Cherwell’s customer services are very helpful and friendly. Communication is excellent. Whenever we needed a product they’re fast in sending a quote."

Quality Assurance and Cleanroom Specialist

Manufacturer & Supplier of Biocidal and Cleaning Products for Cleanrooms

"Customer service is excellent and I always receive a swift response from one of the team. Should I request a price - I am then provided with information regarding any costs and an estimated delivery date. Once an order is placed, it is always on time. Any queries are quickly resolved. It is a pleasure doing business with Cherwell - it really feels like you care about the customer."

Will Brearley

Helvic Limited

"Alex in sales is fantastic, Hamish has been super helpful too and I've never had a bad experience. Big thanks to Shareen for completing an NC in about 3 hours today too! Saved us a huge headache down the line and we can't thank you all enough. Easily the best supplier we have - there's a reason we rely on you for our most critical media."

Julie Willis, Senior Assistant Technical Officer

Cellular Molecular Therapies Department, NHS Blood and Transplant

"I am always pleased with the efficiency and quick turnaround time when I send our Air Samplers off to Cherwell for their service."

Microbiology Technician

Teva Pharmaceuticals

"The service from Cherwell is excellent, they will always try to provide help where possible."

Karen Salisbury, Healthcare Scientist

Wrexham Maelor Hospital

"Cherwell provide very efficient service, communication and good product choice."

Gerald Prout, Managing Director

Kennet Bioservices Ltd

"All my contacts with Cherwell have been resolved satisfactorily with 24-48 hours."

Tracey Roberts, Quality Assurance Technician

Wrexham Maelor Hospital

"We have bought Cherwell products for years and if we have any kind of issue, it is always dealt with promptly by friendly, professional staff."

Assistant Pharmacy Purchasing Manager


"Cherwell provide prompt notifications regarding products and closures i.e. Bank holidays etc. Up to date information is always forwarded on to the customer."

Head Microbiologist

North Tees and Hartlepool NHS Trust

"Thanks Emma – and all for your help. This does serve to back up the reason we have had such good relations with Cherwell for so many years. Proactive holistic bigger picture thinking."


Our team

Andy Whittard

Managing Director


Managing Director

Andy Whittard

Andy has been Managing Director at Cherwell since 2005. He originally joined the business in 1990 as a service engineer then transferred into sales, eventually joining the board as Sales Director in 1994. Since being appointed MD he has overseen significant growth in the business.

Andy is a Cranfield School of Management Business Growth Programme alumnus and is second generation in the family business.

Martyn Young

Operations Director


Operations Director

Martyn Young

Martyn joined Cherwell in 2015, having always been in manufacturing. He trained in Production Engineering and has led many disciplines from quality, process engineering, new product introduction, production and General Management. His industry experience spans from automotive to medical device/pharmaceutical and he has enjoyed global corporations to start ups and now back with a family owned enterprise.

Hamish Hogg

Microbiology Product Specialist


Microbiology Product Specialist

Hamish Hogg

Hamish joined the Cherwell team in January 2019. Hamish holds a Master’s degree in Biomedical Sciences and has a number of years’ experience based in Clinical Microbiology Laboratories before working in the medical devices industry.

His more recent roles focused on providing technical expertise and managing customer relations. This previous experience in similar roles within technical support and customer service really strengthens our team.

Jonathan Roger

Engineering Manager


Engineering Manager

Jonathan Roger

Jonathan has been heading up the Engineering department at Cherwell since April 2019. Jonathan studied Mechanical and Manufacturing Engineering at Portsmouth University before completing 15 years in the newspaper printing industry. He then worked for 8 years in various roles in the fast-moving consumable goods industry.

His previous roles have focused on engineering, quality and production management. His skills in these areas will identifying key opportunities to further enhance manufacturing processes and engineering systems here at Cherwell.

Thomas Parkhill

Microbiology Sales Specialist


Microbiology Sales Specialist

Thomas Parkhill

Thomas joined the sales team at Cherwell in October 2019.  He studied Molecular Biology at the University of Dundee in Scotland, before moving to Biocatalysts, an enzyme manufacturer, based in Cardiff.   During his five years with Biocatalysts, Thomas progressed to the role of Business Manager for Northern Europe territory.

Tom brings valuable additional experience of technical sales and project management to our team. This combined with his energy and enthusiasm in microbiology will help us to continue to deliver added value to our customers.



The Environmental Monitoring Processes and Validation Guide

We cover the key changes to the revised draft of EU GMP Annex 1 - Manufacture of Sterile Medicinal Products.

What does it mean for your environmental processes?


Download Guide


Please see below for our current job opportunities

Production Technician

We have a vacancy for a Technician within our Production Team, working full time, Monday - Friday with shift times between 6am and 6pm.

Find out more

Quality Assurance Technician

We currently have the full time, permanent position of Quality Assurance Technician available. Reporting to the Quality Assurance Supervisor, this role is part of a small team, who are responsible for the implementation and maintenance of the company quality management system which is currently registered to ISO9001:2015.

Find out more

Quality Assurance / Quality Control Technician

We currently have the full time, permanent position of Quality Assurance / Quality Control Technician available. Reporting to the Quality Assurance Supervisor / Quality Control Manager, this role is part of a small team, who within Quality Assurance - are responsible for the implementation and maintenance of the company quality management system which is currently registered to ISO9001:2015; and within Quality Control - is responsible for the testing of finished products in line with set protocols.

Find out more