Here's my guess of how each of the 12 regions of the UK will vote from north to south:
Scotland - Heavily remain as the Scots have been pro EU for a long time.
Northern Ireland - Heavily remain possibly due to high EU funding there.
North East - Moderately leave with the EU fisheries policy being a major issue in the area.
Yorkshire & Humber - Moderately leave as the no nonsense Yorks people dislike all the nonsense from the EU
North West - Comfortably remain as the big cities will vote heavily in that direction.
West Midlands - Moderately remain due to worries over what might happen to manufacturing after a Brexit vote.
East Midlands - Heavily leave due to concerns over immigration in a mainly agricultural local economy.
Wales - Narrowly remain influenced by the Labour Party's pro EU stance.
East Anglia - Heavily leave for the same reason as the East Midlands.
South East - Comfortably leave due to immigration as it's the gateway into the UK from continental Europe.
London - Heavily remain as the city is the most cosmopolitan and multicultural in the country.
South West - Heavily leave due to immigration and their non-conformist local identity.
So that's potentially 6 regions for Remain and 6 regions for Leave.
The majority of the most densely populated areas are in favour of Remain if my guesswork is anything like correct which makes them firm favourites at this stage. Still could be an exciting referendum results night on tv though!
you know what is ironic? i seen map from 1975 uk referendum and smallest support for eu was in scotland, norn iron, wales, and even london...