Thanks - I actually travel to Heathrow very regularly on the domestic run and that was what I expected. Bad though Heathrow is I actually find Birmingham worse. I got told off for wearing my watch whilst going through the other week even though it is a small ladies watch and did not (and has never) set off their alarm.
We will actually be transfer passengers at Heathrow having come down from Edinburgh and will be doing the transfer from BA Terminal 1 to Terminal 3. I did wonder if CX had increased the checked in allowance as BA did immediately after the problem began to allow for passengers who might have cabin baggage problems but I guess not.

Oh well ho hum - at least we are allowed cabin baggage again!