N.J.:
I shall grant you the dubious "honour" of being replied to first, given that it's your post. Yes, of course, I was being a wee bit flippant with my "Plod scenario". However, there really isn't a "pecking order" as you seem to believe, each allegation must be treated equally.
The significant difference here is of course the fact that it involved an M.P., but it would not have been dealt with in any of a more "heavy handed" manner than would the "Bethnall Green old dear" in my fictional "conversation".
I do not seek to "trivialise" this matter but it really is a fact that the Police are apolitical as indeed ex Dep Chief Quick's successor, Mr Yates, was seen to be during his recent investigation into Lord Levy et al.
ludwig:
"...without being told to." You would not make such a statement if you knew how the Police operate. They are independent, are not controlled by ANY political party, they act upon information receive and gather evidence which is ultimately judged not by them. Such is the reason why we have a criminal justice system in this democracy which we have the honour to be part of in the U.K.