Toshiba Exceria pro @£15.81 inc postage at that price I'm going to try themhttps://www.7dayshop.com/sd-cards/toshiba-exceria-pro-micro-sd-sdhc-sdxc-memory-cards-uhs-1-95mb-s-full-size-sd-adapter
Even better value here http://www.picstop.co.uk/microsd-sdhc/sandisk-extreme-microsdhc-100mbs-a1-c10-v30-uhs-i-u3-32gb.html
That's a pretty good price, would you mind sharing the link?
Just bought micro SD cards SanDisk extreme 16GB for £13.47 each and discovered that I had the remains of a gift card reducing the price further. Happy days.
Thanks for that David, the open acoustic devices team will try these out to see what sample rates they can do.