(I am going a Vic here with another last posting, but I am answering a direct question!!)
Tony - the Grand Shaft is entirely the responsibility of the Dover District Council and anything that happens is there decision.
The Grand Shaft is a Grade 2 listed structure and as far as I am aware is part of the Scheduled Ancient Monument of the Western Heights. Any work that takes place to such a structure requires the concent of the planning department and possibly the English Heritage Regional Inspector of Monument.
As far as I know the ok was given to tidy the site, but permissions weren't sought to limewash/repoint the brickwork, drill holes in the wall for the 1806 number, and paint the murals. The whole situation could have quite easiliy have been avoided if permissions were sought before work started.
QUOTES FROM DDC WEBSITE:
http://www.dover.gov.uk/conservation/listed_buildings.aspx
"Alterations Requiring Consent - Painting exterior brickwork, render, flint or stone for the first time or changing the colour of previously painted work;"
"It is an offence to alter or extend a listed building without first gaining listed building consent from the District Council and offenders may be prosecuted. The current penalty on conviction in a Magistrates Court is a fine of up to £20,000 or imprisonment for up to six months, or both. This applies to the owner, the builder and the architect or surveyor involved. If any unauthorised works are found then the Council may also serve an Enforcement Notice requiring the building to be reinstated to it's former condition."