After last years ran in the night, I was pleased to found out that this year RHTT (Rail head treatment train) ran in the day as 3J96. I am very lucky to get 37s because the RHTT in some areas use 66s or 67s. I have photographed the following combinations on 3J96: 37059+37069, 37059+37218, 37059+37602, 37069+37218, 37069+37259 & 37259+37602.

This my first sighting of this year RHTT but is not a action shot it spraying.
37059 stopper under the footbridge at Bangor

... with 37069 stopped in the centre road

This is not in the wrong order as it propels back into the signalbox for the
siding

37059 enters the siding for repairs with the compressor

37069 + 37259 leaves Anglesey onto the Britannia bridge

37069 + 37059 departs at Bangor for Holyhead after being held for
passenger service.