AF Fares
I just had a quick look. AF offered one-way fares for GBP7 and GBP27 (excluding taxes/fee/surcharges) in V-class (very limited availability) if you booked 40 days in advance. Otherwise the cheapest one way was GBP275.
From 01APR14, the cheapest one-way BRS-PAR fare on AF is GBP275 - plus taxes, fares, surcharges. So probably about GBP320 all in, and you have to travel via AMS.