The Harwell Science and Innovation Campus is about one hour's drive from Heathrow Airport and two hours or so from Gatwick Airport. Your host may be able to arrange transport from Heathrow. For flight details, contact the appropriate airport enquiry services.
Heathrow
A frequent coach service, Reading-Heathrow Railair, takes passengers to Reading Station to connect with trains to Didcot Parkway. The service picks up from all four terminals and the journey time to Reading is approximately 40 minutes, depending on traffic.
Driving from Heathrow Airport
Take the M4 motorway towards Slough, Reading and the West. Continue as far as junction 13 and then head North for about 8 miles on the A34 towards Oxford and follow the A34 (northbound). See Driving for further directions.
Gatwick
A direct train service operates between Gatwick Airport and Reading Station to connect with services to Didcot Parkway. The journey takes about 1 hour 40 minutes.
Driving from Gatwick Airport
Take the M23 to London and Guildford. At junction 7/8 join the M25 to Heathrow and Watford. At junction 15, take the M4 towards Slough, Reading and the West, and continue to junction 13. Head North for about 8 miles on the A34 towards Oxford and follow the A34 (northbound). See Driving for further directions.
Further details on airport connection services (for Gatwick and Heathrow) are available from National Rail Enquires on +44 (0)8457 48 49 50.