Yes. Yes it is.
For fuck's sake, this woman was presenting The Antiques Inspectors at the time of her death. She was hardly in a position to gain access to the kind of information that would warrant a hit being taken out on her by a highly-organised and coordinated group of paedophiles, the existence of which (for all the proof of Westminster corruption with regard to potential paedo scandals) still remains to be proven.
If Jill fucking 'Songs of Praise' Dando really 'knew something' that would warrant a state-sanctioned assassination, you can guarantee a lot more people, both within and without her circle did. So why were there not more killings, and why no damning leaks in the intervening years? Why was the material she apparently presented to the BBC never passed on to police once the BBC (allegedly) rejected it?
Maybe John Leslie 'knew something', huh?
Sheer fantasy.