We are flying home today and went through security in T5. Lines were non-existent ( we have Fast Track) but it took awhile because the scrutiny was so strict. I set off the walk-thru screener so was sent through the full- body scanner. Then I was wanded, followed by a very complete pat-down, although I am slender and wear one layer of thin clothing, so there is no place to hide anything. Finally my shoes were thoroughly checked before they were satisfied. I was wearing the same outfit I always wear when flying, and a very small necklace that has never set off a screening machine before. I do have titanium clips in my chest following cancer surgery, but those do not usually cause a problem either. I think they have the machines set to be super-sensitive.
Then my daypack was subjected to a thorough search, taking everything out for scrutiny and checking with the little bomb-sniffer swab thing. I carry a Silva compass for our hiking and she said the liquid in it (a teaspoon or so) set off an alert. They were also interested in the salt and pepper grinders I was carrying ( we had a self-catering flat in London and I couldn't see leaving these behind---never had a problem with them before). I think the curry powder may have a roused suspicion as well. ; )
Through it all she was very polite, and I thanked her and said I was glad they are so thorough. But it did take an extra 10 minutes.