With regard to the letter at post #1353, TCT's address is entirely visible through the rather clumsy crossing out; I think that detail really should be treated as "staff in confidence" and certainly not displayed on any public forum
It's a business address therefore completely public so not necessary to cross out at all:
https://www.endole.co.uk/company/077...iplane-limited
Interesting link to Robert Marshal in there as well and according to this link:
http://companydb.uk/07763562-bird-in-a-biplane-limited
They both were registered at the same address for the company before it moved to London.