Suburban Design Guide SPD2 now withdrawn :-) The infamous SPD2 document was widely regarded as a developer's charter which permitted them to apply for planning permission for almost anything almost anywhere. It encouraged the replacement of large family homes with gardens by block of up to nine flats, and the effects are particularly obvious in Purley, where planning permission has been applied for to replace about 150 homes just since 2018.
I'm delighted to report that at a full meeting in Council on 25/7/2022, this document was officially withdrawn. Applications will still be subject to national, London & Croydon plans, but developers can no longer rely on the implied encouragement within SPD2 :-)
Cllr Simon Brew