I have no business involvement with this but thought this might be of interest to some PW members.
If it was closer I would certainly go and have a rummage.
Here's the catalogue:
http://guns.southams.com/latest-catalogue/?doing_wp_cron=1426011426.5256190299987792968750
From the Southams website it says:
Sales are conducted at Bedford Auction Centre, 26 Newnham Street, Bedford. MK40 3JR.
There is no parking at the Auction Centre, however ample metered kerbside parking is available and there are multi storey carparks within easy walking distance, the closest being Lurke Street.
Please check out the details before you head out. It can be a mistake to believe everything you read on the interweb. The catalogue lists some nice things.