Walked in the Reading Oxford Road WH Smith store and was watching their Kobo ebooks one of the very nice staff double checked for me that their Kobo ebooks will be largely reduced from tomorrow September 1st, 2013. He has mentioned two models, the mini version which is here: http://www.whsmith.co.uk/products/kobo-mini-white-ereader/product/36144563
black or white, will be reduced from £59.99 to £29.99,
the ordinary sized ones, which are here:http://www.whsmith.co.uk/products/kobo-touch-black-ereader/product/35487678
black or white, will be reduced from £79.99 to £39.99,
Sounds like an option if you are not only after the very-easily-out-of-stock Nook simple touch.
P.S. now online too if you are bothered heading to your high street store. Be quick if you like it.