Seems odd there pairing 172 153 again
This was tried on the stourbridge line when the 172s were brand new.
There was a regular working on the stourbridge dorridge every day ,but after just a short few weeks it was found no good , they both have differnt braking and acelerating gear charitics and were always fighting each other.
On wet rails the 153s brakes would apply well before the 172 and thus cause wheel flats, very quickly I remember two vivid trips on leaving stourbridge and having very bad wheel flats by time weg got to dorridge so much so the 153 was taken off and left there,another trip and the 153 was taken off at snow hill and returned back to tysley
The duo lasted about 2 weeks at most before being abandoned and since then uptill nowits never been seen again.
There should some photos on here I took back then , and I have video somewhere of 172 153 combo of the time back then too.
The 153 floor is also about 6 inchs higher than 172
So none will ever couple together using front ends.
Might work in the dry, but wet rail no way, seen it happen before and didn't work well.
.I'm sure there was also a 150 and 172 trial too back then too.