en.wikipedia.org
It mentions in Wikipedia under 'Murders', 'Stratford' the "cloying scent" left by the killer and citing
Walton, Richard (1992). ""Golden Girls' Horrible Mutations" by Richard Walton".
Unsolved Mysteries. Kensington Publishing Corporation. pp. 107–120.
ISBN 9781558176546
tried searching online for this book with zero success.
I have bought the vintage magazine referenced under the section, 'Disproven Links to Other Cases', 'Murder of Lynda Farrow',
Smith, David James (24 May 2009). "HER KILLER THINKS HE GOT AWAY WITH IT 30 YEARS AGO; This bunny girl's brutal murder was one of the most sensational unsolved crimes of the 1970s. Now, three decades on, is the net finally closing in on her killer? David James Smith investigates".
Sunday Times. p. 24.
since searching news stories online even two digitalised old newspaper sites I have to pay to view, I couldn't find anything to state there was DNA found of the murderer of LF, so I'm not ready to make a longer post trying to paraphrase the text yet. But I can say that it says that no DNA was found at the time, it was only when it was suggested to test her against the DNA found to be matching when reopening Lynne and Eve's cases that they re-examined all the saved items the police had in storage at the crime scene, that DNA was found and then tested against LW and ES, it didn't match. But LF's DNA is now on file but doesn't match anyone else on record.
I am wondering what DNA they found as Lynda was said to not have been sexually assaulted. Although they say she put up a fight so maybe through that.
So it looks like Lynda is ruled out and the police could have announced that a bit clearer so I didn't have to buy an old magazine to read it.