I can see Blackrock and other investment houses going for this. I'm sure they will be happy to fork out the tax on the £billions they hold in Bitcoin. They will probably speculate through and overseas exchange they own, and incur massive losses. That way they can get massive credits to reduce their profits on other assets like carbon credits.
Such laws are always for the "little guys" not for these trillion dollar companies that define the laws themselves! You can bet your ass they never mind such laws because if they did, they'd never allow it to be passed 