On arrival at Toton depot, I took my chance and

approached the main office to request access. I was not hopeful but delighted to be afforded access and was issued with one of the 'official' orange tabard. I was given a brief health and safety talk about staying off the running lines and to keep to the official walking routes and was allowed on my way! I went straight to the fuelling point. Here, 56051 is being attended to prior to its next turn. 56051 was one of the BREL Doncaster built engines and was still relatively new at this time.