The government would have to offer financial compensation should the 22LR be rendered useless, £100 per rifle sounds low but would probably be fair given the number of cheap old brno’s etc.
How many in the UK, say 250,000? That’s £25m in compensation.
Or will they just screw the 22LR owners and claim they can still shoot HV rounds and new ammo has ‘acceptable’ accuracy - most likely outcome
Nothing compared to what’s being spent on other non essential things going on in the country