5GHz in UK

In the UK there are 3 sub bands in 5GHz known as Bands A, B and C.

A and B are license exempt (20omW EIRP for Band A, indoor use only, 1W EIRP Band B indoor and outdoor, Band C is lightly licensed and can be used for say fixed links between buildings).

I believe the Ofcom regulations only allow for 20MHz channels in 5GHz bands, so currently it would be illegal to use 802.11ac, there's also not enough channels to support the higher speeds of 802.11ac.