Fair to say it was quite challenging. The interview process took place over a couple of weeks.
It focused on technology experience and the ability to utilize knowledge and prior experience. The interviewers seemed very knowledgeable. The questions were not easy, but I think I answered them fine. It gave the impression of a good place to work. No complaints.
The questions were job/application-specific, so it doesn't make sense to share the questions I had here.
The following metrics were computed from 4 interview experiences for the Google Software Developer role in London, England.
Google's interview process for their Software Developer roles in London, England is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Google's Software Developer interview process in London, England.