I would recommend joining with some recruiters from Durlston Partners. They are fairly upfront about the compensation on offer and for C++ in London it is significantly better than the numbers I've seen in this HN thread. For example, I've seen roles with base salaries of £250k and generally large (or even uncapped) bonuses on top of this...

For example: https://www.linkedin.com/posts/rahnpreet-sandhu-2b84a515a_co...

Amen to that!