I think not.

The protests last Saturday got a boost from the murder of Charlie Kirk so the large turnout is misleading.

The only British political figure willing to accept Elon Musk's backing is Tommy Robinson, and he is not a major player, just someone good at getting into newspapers. Very different from the US or continental Europe - for example Germany where AfD (which took Musk's money) has seats in both the national and European parliaments.