... . Rob posted: 16 Feb 2019 19:09 from: Martin Wynne Hi Rob, I didn't quite follow that? I have marked up the photo (which I should have done in the first place): 2_161247_070000000.jpg At A I think I can see the top corner of a fishplate. If it was bolted tight it would be flush with the rail head. Which suggests that the bolts in the closure rail are quite loose (and maybe tight in the switch rail?). Here's a drawing of BH fishplates: 2_161306_210000000.png It's clear that if the bolts are not tight, not only can the rail move sideways as intended, but it's also not held firm in vertical alignment. So you wouldn't want to slack the bolts by more than a fraction. At one time I was convinced that there must be some detail of these loose-heel joints that I was missing. A spring washer under the nut perhaps? Over the years I've searched many times for a proper explanation. If they were used only in sidings and yards simply leaving the ...