As a follow up to the above post, I found all of the information that I wanted on the drawing that I have. It's been over drawn a few times but I could still see where some of the lamp irons were originally placed and I don't think that there was a vertical member originally, either. I think that it was put in just so there was somewhere to fix a lamp bracket to.
Here's the story, so far. Axleguards, springs, axleboxes, wooden brakes and cross beam hanger all fixed in place. I wanted to be able to remove the wooden brake blocks when it came to painting as I wanted to leave them in their natural state. However, because of the angle, this wouldn't have been possible so, I've had to leave fixed in position. After painting, I'll have to pick them out in a different colour unless, it's possible for me to mask them off. There's an etch, with all of the necessary rigging, for the iron brake shoe version but, as mine is totally different, I won't be using any of it, shame really.
Jon