The 30th BiCon will take place in Bradford in August. The deadline for booking on-site accommodation was 29 June, so if you haven't booked yet, you can't stay overnight on site. However, you're welcome to attend for the daytime (you can pay in advance or on the door), or stay at a nearby hotel such as the Bradford Hilton which has double rooms from £28/night. All the details can be found on the BiCon 2012 website. (Not details of local hotels, but there's Google for that.)
Or you can write to BiCon UK's permanent postal address, which is:
BM BiConThis website (bicon.org.uk) is permanent, and independent of each year's BiCon organisers.
27 Old Gloucester St