Signal Boxes

[emudriver]

Hi everyone,
I am currently compiling a book regarding the main line from London Liverpool Street to Cambridge. I would like some help with some signal box pictures of the following - Enfield Lock, Wormley, Broxbourne Junction, Spelbrook, Shelford and Shepreth Branch Junction. Thanks in advance for any possible help.
Regards,
emudriver.

 

[Llanigraham]

Google Images?
Certainly the first on your list has atleast one image, plus links to possibly others.

 

[Dr Hoo]

I presume that @emudriver [welcome to the Forums, by the way] is seeking to avoid any undue overlap with Michael Bonavia’s well-illustrated book, ‘The Cambridge Line’, published by Ian Allan in 1995?

 

[Lucy1501]

Flickr, photos.signalling.org and the signalling & signalboxes Facebook group are a good place to start. Also try the local archive - they may have a few photos.