Toshiba Exceria pro @£15.81 inc postage at that price I'm going to try them https://www.7dayshop.com/sd-cards/toshiba-exceria-pro-micro-sd-sdhc-sdxc-memory-cards-uhs-1-95mb-s-full-size-sd-adapter
Thanks for that David, the open acoustic devices team will try these out to see what sample rates they can do.
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.
That's a pretty good price, would you mind sharing the link?
https://www.amazon.co.uk/dp/B010NE3ND8/ref=pe_3187911_185740111_TE_item
Even better value here http://www.picstop.co.uk/microsd-sdhc/sandisk-extreme-microsdhc-100mbs-a1-c10-v30-uhs-i-u3-32gb.html