It has much more to do with ending Freedom of Movement with the EU. In this respect Brexit has worked (although who knows the long term implications). Basically labour demands have gone through the roof and its now an employee market. My aunt who is a hotel cleaner just got a £500 monthly increase and has been offered a retention bonus. Lorry / truck drivers are constantly being approached to switch jobs with higher payouts.

The rest of the market is getting a feel of what its like to be a software engineer.