Remainers are the fantasists on here but it's somewhere to let off steam. The Tories won a London constituency on a 51% vote of a turnout of 34%. The Rejoin the EU, LibDems , and Greens lost their deposit. Labour got 34%; I wonder what his views were on the EU.
It will be said Old Bexley is a Tory stronghold but London has become a Labour city with the huge "white flight " to the shires. Boris did buck the trend by defeating Ken Livingstone twice. Vote Leave won the referendum and Boris won the general election. The voters spoke and will again. The EU is not doing much to change voters minds here.
Clearly someone quite clueless on Old Bexley and Sidcup, but claiming to know better than anyone else.
I think you will find it is you who is the fantasist.
A few points:
The seat is far far whiter than the average London seat. It also has an older population.
It voted 62% leave whilst London voted 70% remain. That's a 32 point difference.
It is a white flight destination.
Labour have never been close. Not even in the 1997 landslide.