Churchill would want Britain to stay British. Granted, his mum was an American, but that kind of immigration is quite different than Britain being pace to become a land of cold-weather sharia. http://www.youtube.com/watch?v=6-3X5h...
Israel is an officially Jewish state, so Why can't Britain be an officially majority British state? Maybe that majority would be 90% British, 85% or 95%, but it should remain a majority British! For those who don't know what British means, it's the descendants of the Angles, Jutes, Saxons, Scottish, Picts, Scotch-Irish, Normans, Welsh, and Danes. These people belong or belonged to legitimate ethnic groups. Their descendants deserve a homeland and deserve to be a collective majority in that homeland.
Reparations could be paid to former British colonies in return for Britain allowing fewer of their citizens to emigrate to the UK. Relations could be improved with Muslim nations to allow them more control of their own affairs with less interference from British corporations and other entities. Reparations for war crimes against the Muslim world should consist of foreign aid BUT not access to British land. And if they want sharia in their nations, let them have it, but NOT IN THE UK!
Sanctions should be dropped against Iran and peace should be sought.
Winston would understand that it's senseless to be a colonialist around the world when Britain itself is being colonised. To stop foreign colonisation of Britain, immigration should be halted, illegal immigrants should be deported, and citizen immigrants offered the value of their lifetime earning potential, property, and expected pension benefits in Britain to return to their homelands with British citizenship revoked. This would be an offering and not a mandate.