Is their any recent (2023 or later) UK salary data showing the salary gap between men and women?

There's some info here, but I'd take it with a pinch of salt without a lot more details on sampling approach, it's based on a very small sample (902 engineers, 92% male and 8% female) so probably not statistically significant unless they were very clever in their sampling:

https://teng.mydigitalpublication.co.uk/april-2024/page-28

Similarly for the IEEE survey I'd ask the same questions.

There's some info here, but I'd take it with a pinch of salt without a lot more details on sampling approach, it's based on a very small sample (902 engineers, 92% male and 8% female) so probably not statistically significant unless they were very clever in their sampling:

https://teng.mydigitalpublication.co.uk/april-2024/page-28

Similarly for the IEEE survey I'd ask the same questions.

Hello Andy:

I was also concerned that the male/female ratio was not defined - resulting in possible sampling bias.

The data was also given for earlier years starting with 2019 and dollar difference has remained the same over the five years.

Peter