Cancer Research UK

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London Research Institute

Clare Hall Site

The Scientific Director of the Clare Hall laboratories is Dr John Diffley. The laboratories are housed on a purpose-built research campus adjoining Clare Hall Manor (a Grade II listed building) located approximately 15 miles to the north of central London in the Hertfordshire greenbelt.


The Clare Hall laboratories were officially opened in 1986. Under the guidance of Director Tomas Lindahl, Clare Hall became, and remains today, a leading centre for studies of DNA repair, recombination and replication, cell cycle control and transcription. In addition, the site has provided scientific support services of increasing sophistication over the years.

Dr Tim Hunt, a Clare Hall Group Leader, shared the 2001 Nobel Prize in Physiology or Medicine with his Lincoln's Inn Fields colleague, Dr Paul Nurse.

Directions to Clare Hall laboratories

Postal address:

Cancer Research UK London Research Institute
Clare Hall Laboratories
Blanche Lane
South Mimms
Potters Bar
Hertfordshire
EN6 3LD
United Kingdom

For directions to Clare Hall Laboratories, click the appropriate link below:

Overground train from London Kings Cross Station to Potters Bar

Trains for Potters Bar leave King's Cross rail station every 30 mins.

The 398 bus to Clare Hall leaves approximately every 20 minutes from outside the main entrance of Potters Bar station. Clare Hall is the terminus and the journey takes about 20 mins. At the terminus, alight and turn left onto at the mini-roundabout. Clare Hall is the first turning on your right.

Alternatively, 'Potters Bar Radio Cars' is located to the left of the station - ask for a taxi to take you to Cancer Research UK, Clare Hall (a 10 minute drive).

Railtrack timetable enquiries here.

Underground train to Cockfosters (north terminus of the Piccadilly line)

At Cockfosters station take the underpass to the other side of the road, following the signs for buses to Potters Bar. The bus stop is located at the top of the steps, and you need to get the 298 to Potters Bar station, then follow the directions from Potters Bar above.

By road from M25

Exit M25 at junction 23. Follow signs to 'South Mimms and Colney Heath', keeping in the inside lane.

Just before the service station the road bears left (do not go into the service station); the Lanterns depot is on the left hand side. Keep left at the mini-roundabout, drive over the A1M and take the next left turning into Greyhound Lane.

At the end of Greyhound Lane turn left into New Road - this leads to Blanche Lane. Drive out of the village over the M25 and turn left at the mini-roundabout. Drive straight over the next mini-roundabout and Clare Hall is the first turning on your right.

Please report to Security who will show you where to park.

For an online road journey planner, see the RAC route planner.