At 8.91, this 8GB SDHC card from Sandisk is one of the cheapest in the UK and it comes with the added guarantee that it is backed by Amazon and Sandisk, one of the biggest memory manufacturers worldwide.
The SDHC memory card is a highly secure stamp-sized flash memory card, which can be used in a variety of digital products: digital music players, cellular phones, handheld PCs (HPCs), digital cameras, digital video camcorders, smart phones, car navigation systems and electronic books, that follows the SD 2.00 specifications. The SDHC card has a security feature for protection of copyrighted data.
Note that this is a SDHC card with a Class 2 rating which means that it will not be as fast as SDHC class 6 devices for example. It can withstand operating shock of 2000Gs which is equivalen to a 10-foot drop to the floor.
A user from Amazon said that "This card is classified as a "class 2", which means that it must have a minimum write speed of 2 megabites per second, this seems fast enough for my purposes, other cards are classified at class 4 (4 mb/s min) or class 6 (6 mb/s min), so its not the fastest, but it seems fine for video. Just a note though....make sure that the device that you plan to use this card with is SD HC compatible as some older devices wont recognise this card."
Get this card from Amazon for only £8.91 including VAT and delivery