Re: What is the only way to take advantage of Brexit ?
Re-entering Europe will not 'fix' Brexit, but make things significantly worse.
We'd not return under remotely the same terms, and politically it would further damage our reputation as an independent voice within the G7/G20 to make it explicit that we are dependent on the largess of Europe to survive.
Not only that, but it's a particularly daft fantasy that, even as a member, the other European financial hubs aren't actively competing with London. Throughout our membership there were moves to 'even out' the power spread between London, Frankfurt, Paris and Amsterdam - and not one single one of those changes was to the benefit of London. As a 'failed leaver', and given the changes across Europe since we left, it's pretty clear that we would not return with our existing competitive advantages intact.
Sadly, our political leaders have been forced by the continued idiocy from 'sore leavers' to do as little as possible about Brexit - keeping the whole country in limbo is perhaps the weakest decision they could make.