During my last visit to Grange-over-Sands I photographed the BR (LM) box dating from 1956 from within the yard of the car repair business seen in the foreground, see...
https://www.ontheupfast.com/p/21936chg/24425912004/grange-over-sands-signal-box However, perhaps as a sign of the times, the yard is now closed off with palisade fencing preventing access. Being a Saturday morning the gates were closed so a gap through the trees from the B5277 road has to suffice.