Info -where did I get this infrastructure diagram from please?

[GRALISTAIR]

I am after some help please. I am passionate about infrastructure and electrification and I keep a notebook. I usually capture an electronic image on my iPad or iPhone and crop then print and spray glue into my notebook. Old notebook full and transferring to a new one. I got the attached image from somewhere but did not keep an electronic copy to go into my new notebook.

Anyone know where - issue etc I got it please? Unusual request I know.

 

[Dr Hoo]

The map has some errors and omissions so not necessarily very 'valuable'.

 

[GRALISTAIR]

Found it. Page 53 March 2019 Modern Railways