You may recently have seen your house being photographed. The City Council are in the middle of a survey of the estate and have noticed several infractions of the Design Guidance. The only reason they have not dealt with the infractions noted so far is because of their workload and the time it takes to work out what has changed since the last survey.
Note that the Design Guidance for the Ethelburt Avenue (Bassett Green Estate) Conservation Area is included in the Welcome Packs for new residents which are available from Street Reps. It can also be found on www.herbertcollins.co.uk