GATWICK & LUTON airport users will suffer over the next six months with the loss of through rail services via Kings Cross from 11 September. This is due to the major works concerning the new Kings Cross Underground station and the Eurostar terminal at St Pancras. Trains from the south will now terminate at Thameslink Kings Cross, whilst those from the north will finish at St Pancras. Allow ten minutes if you have to change trains. There is a pedestrian route between the two stations including narrow pavements along a busy main road, the main line Kings Cross area, and a building site. For those whose navigation works beneath the surface a complicated way through exists without coming out into the sunlight, good for a rainy day.
http://www.thameslink.co.uk