Meetings are held at The Addison Centre, a Community Centre in Kempston,  at 12.30pm on the second Tuesday of the month. Their own web site is here.

The Addison Centre is situated in Addison Howard Park which has Bedford Road running alongside it. This is the main route into Bedford from Kempston. The entrance to the Centre is via Hillgrounds Road. There are traffic lights close to the entrance on a crossroads on the Bedford Road where Hillgrounds Road and Spring Road intersects.

Kempston Keep (a former military barrrack) is also close to  the the junction on the Bedford side of the crossroads and is a useful landmark.
(Satellite,Street View and Directions available via this Google map)
There is a large free car park alongside the building
The postcode MK42 8PN may not be accurate enough for your satnav to pinpoint the exact location - so please read the instructions.
The Probus Club of Kempston