Yesterday I flew through Birmingham (UK) to FRA; they were insisting on all electronics being out of bags and separately in a tray. I had a smartphone, a laptop, a Kindle, a camera, and a GPS device. They singled out my Kindle for a swab test, none needed to be turned on. Husband also had devices, he didn't get any secondary at all.

At FRA, they specifically asked for phones and laptops and Ipads to be out; I saw no one being asked to turn them on, and no swabs observed either. The line was exceptionally long, though--nearly missed my flight to the US!