I just got back from vacation on the 13th. I went through security twice at GRR (got bumped to a different flight) and didn't have any problems either time with my Kenwood TH-D7 being in my carry-on. They paused as my backpack went throught the x-ray... but I can hardly blame them since inside was a digital camera, ipod, my HT, laptop power-supply, audio-cables, etc.
Although it was before the UK stuff, I left from SJC without any problems as well.
I would highly recommend having a copy of your license along... and being able to prove you can turn it on and it works.