Thanks everyone
The Wikipedia description has given me the best, brief description of Blythe Hill Fields.
I managed to find out where Blythe Hill house was as that is close to my residence. And a tiny bit more information about Job Heath's Brickmaking business and how the lower level of Blythe Hill fields was were the earth was dug up.
Also the maps I purchased showed the change of Brockley Park - initially they were looking to put St Saviours church on there.
The best map I found was on the ideal-homes.org.uk website. They also give some interesting insight into other areas such as Forest Hill, Brockley and Catford.
I haven't found any books specifically related to Honor Oak but I am going to try one more of South East London - Leigh Hatts.
The good news is that I think I have 2 maps from 1894 and 1914 which will show the change nicely.