According to MK's website it's fitted with a 2Amp Bs1362 fuse. I always thought that 3Amp was as low as those fuses went.
BS1362 fuses are available in 1, 2, 3, 5, 7, 10, and 13A sizes.
3 and 13 are the most common, but some hardware stores, supermarkets etc. carry 5, and occasionally 2A as well. 1, 7, and 10 are much rarer.