Having bought and sold in London, my opinion is that London property will always be hot if you're targeting a particular wealthy area, that said those properties are being sold for a lot less and some new builds aren't being sold at all, even at a discount/free car.
I do believe that if Brexit ends up being a mess, there will be a correction of the UK markets as a whole, not just property so I'd be wary to invest what I could not afford should IR changes negatively impact your holdings but if you can weather the storm, go for it and target the areas undergoing gentrifying or a solid area already that will take a hit but then rise again as it did during the 2008 and 2011 dips.
I do believe that if Brexit ends up being a mess, there will be a correction of the UK markets as a whole, not just property so I'd be wary to invest what I could not afford should IR changes negatively impact your holdings but if you can weather the storm, go for it and target the areas undergoing gentrifying or a solid area already that will take a hit but then rise again as it did during the 2008 and 2011 dips.