Thank you everybody for your help. I am by nature a researcher so I haven't been sitting on my hands.
1. Signal Cabin Style:
Thanks Ceptic for your drawing it helps me a lot. I have come to a conclusion. The style of Signal Box I am looking at for "Lees Lane", on the Gosport to Fareham Line" is part of a Modular Style. My Box is One bay wide, so is Clandon. Fareham East is two bays and Your Bournemouth West is Three bays Wide. I used Brick counting to get the dimensions but had difficulty with the windows. I was going to make them 12"X12" but that didn't seem right so I am going to use your dimensions of 12" X 9"(rounded). This also means that I have to redo my plans. Perhaps it was as well that Alton Models was closed yesterday.
2.Thanks for all of the guidance on the Goods Shed. Currently I have no plans to go West otherwise Crewkerne would have suited. Winchester is out for a day trip because........I have found architects plans for LSWR Aldershot. It is a little confusing because it sits close to the SER Reading - Redhill interface. Plan 1 is 1890 and it has the line on it "Alterations to the Aldershot Goods Shed for SERly" and is dated 1890.
Plan 2 has a title "LSWR Aldershot goods Shed", then it repeats the same line saying it is for the SER. We think that it is a transfer shed. It suits my scheme as I live at Blackwater on the SER Reading - Redhill Line just N of Aldershot, see the RCH map on this link https://en.wikipedia.org/wiki/Ash_railway_station
I am a 90% LSWR with a litte GWR, S&D( with a Midland excuse) and as I use it a lot SER so I think a transfer shed is ideal. The only problem, decent copies are going to cost.
I will be enrolling on the South West Circle after Christmas.