The pound is slightly heavier than the dollar and overall UK wages are lower. But truth is in most of the world being a doctor is a good career but not something you can build outstanding wealth on. Hence Europeans are often puzzled with "I want my kid become a doctor" cliche from American media.
That's just not true. Being a doctor still ranks among the top professions by wage in the UK at least, especially since the wage is largely the same regardless of area, and making six figures in an area where you can buy a house for under six figures allows you to live a very very nice life.