Here is a very recent posting on the Sydenham Town Forum which indicates that the subway will closed and the more startling news that Perry Vale refurbishments are to be suspended:
I provide below an extract from advice given by Lewisham officials to Heidi Alexander, Lewisham's Deputy Mayor, about the Forest Hill Subway and about slippage in the programme of road works in Perry Vale.
That Network Rail are finally taking a positive interest in the Forest Hill subway (they own it) is very much to the credit of the Deputy Mayor who has been concerned over a long period to bring about improvements to the thoroughfare.
"[i]Dear Councillor Alexander
Forest Hill Subway
Thank you for your email dated 20th June 2008.
Network Rail have just informed us that resurfacing and drainage works in the Forest Hill Subway will start this Sunday and will possibly run over two weekends.
In addition, and within the next sixteen weeks, the subway will be closed for a short time, probably for no more than a fortnight, to facilitate repairs to the overhead beams that support the railway tracks. No dates have been published but as soon as these are known I shall advise you further.
A number of problems have been encountered in Perry Vale with the remodelling of the road adjacent to the subway with late changes made to the new private development opposite. Whilst these are not insurmountable, and will be resolved this financial year, completion of the works will not be possible within the original programme. The immediate effect will be the completion of the diversion of various services after which the road will reopen - the planned Highway works will be suspended. Again, I will inform you as soon as the completion programme for the street works can be ascertained ....l"