I know this is a repost i posted it first but due to somebody trying to be smart i dont think it got peoples full attention plus there is now an 8% discount so even cheaper (maybe admin can delete old post) but here goes.
Next cheapest is probably play
Brand: Memory 2 Go
Speed: read 5 MB/sec,writes 1.5 MB/sec
The Memory2Go range of SD Cards offer high quality and high performance at an exceptional price.
FOR THE NOTE THIS IS CHEAPER THAN PICSTOP AS THEY HAVE £2.50 DEL CHARGE