I've read all the responses, which have been very helpful. My initial thoughts WERE to ring the 01904 number, purely as a courtesy, but taking the advice of the railway professionals who have replied, I will just trundle across. My road train is going to be shorter anyway, due to the lack of availability of the Landrover tomorrow, which is when I'll be crossing.
Take it from me,that is the correct approach you are adopting,your safety is not an issue at a CCTV crossing in practical terms,a train will not approach without a proceed signal ,and that train will not do that until the crossing is clear of passengers and vehicles, and before anyone says it,this is backed up by safety devices,T/Cs etc.The railway stuff,ie delays and the like,are our problem not yours,as I've said before,if you are required (or need) to ring the signalman with a large or slow moving vehicle,there will be a notice to this effect,if there isn't one you don't need to call anyone.