Looking at the plans, the facade of this listed building (can't remember off-hand if it is English Heritage or only locally listed) is kept, just like with the swimming pool.
See designs at:
http://acolnet.lewisham.gov.uk/ACOLLATEDOCS/53715_1.pdf

Parking could well be an issue with the removal of two parking places to be replaced by on street parking. I would be surprised if it did not result in a CPZ for this end of Devonshire Road and Woodcombe Crescent. Something which may be inevitable according to some other postings on this site.

It is sometimes a difficult balance between making good use of an old building and the needs of the neighbours. I would be interested to hear other views, particularly from neighbours, so that I can develop a response from the Forest Hill Society.