The other thread on this topic covers the whole airport security landscape, so I'm trying to start one just for practical problem-solving.
I'll be leaving in 2 weeks from US for the Wainwright coast-to-coast hike (Cumberland-Yorkshire). Unfortunately booked via Heathrow instead of Manchester. Plan to use a bulky 5D & 24-105.
I've also considered buying Michael's preferred Panasonic LX1 pocket camera to use instead - easy to pack safely in checked baggage. But apparently they're right between models, with a new one coming out in September that tackles the noise problem. So I decided not to go this route.
If cabin-baggage restrictions continue, I've concluded from what I've read that the best solution is to FedEx the large camera with 'serious' bubble-wrap to my point of departure - the advantage being that I can insure for full value.
The hitch will be packing & FedEx-ing it back again - staying in small towns & then getting to London on a Saturday afternoon. Haven't figured this part out yet!
