Brexit impact30 Aug 2017 06:39
https://www.bloomberg.com/graphics/2017-brexit-bankers/
http://colresearch.typepad.com/colresearch/2017/02/londons-growth-in-employment-sectors-and-patterns.html
30,000 total primary job losses due to Brexit (and another 30,000 or so secondary and induced job losses for jobs that depended on the spending of those companies and individuals) substantial as that sounds is not catastrophic for London . With a workforce of 5m and a workforce growth rate that is pretty steady at 2% (even averaging in the great recession) London adds some 100,000 jobs per year. SO a 60,000 loss spread over 10 years is "only 6%" of London 10 year jobs growth rate. London has a pretty big, deep, diverse job market with many leading new economy sectors (ICT, bioscience, entertainment and media, etc).
Even within the 30,000 business and financial jobs losses to the EU capitals it will not be a pure loss. Backfilling of the empty offices within the sector as relocations from the UK and global network kick in plus other sectors taking up space at slightly lower rents than they might have achieved otherwise will mitigate the raw numbers. This occurred in Canary Wharf during the great 2008 recession to such an extent there we no net job losses in spite of a savage dip in the UK economy. So 6% job losses over 10 years may not be fully realized in any case and the replacement jobs only moderately less well paid than those lost.
They are well paid jobs from the UK and international professional elite right in TEF's patch and not penniless east European waiters in West London serving overweight American tourists in "I love Trump" t shirts, though. Never-the-less baring a catastrophic disorganized Brexit (if FOx and Boris were actually in charge I'd worry more) and thus no hard recession.