Found these at Maplin Kensington High Street today. The price is straight off the shelf so does not appear to be a one-off or special promo.
These are ready to go Low Self Discarge batteries of the same quality as Sanyo Eneloops and GP Recyko. The supplied Uniross 4-cell charger (2 front / 2 back slots) also appears to be of good quality.
You can get cheap 7dayshop pre-charged cells for £3.99 or you can get these hight quality (true 2100mAH) cells with a charger for just £4.99.
Pictures in post below
edit: I purchased 2 packs below which is why the price says £9.98 (before anyone comments).