Any info on lost Day of the Daleks trailer?

[tomdoran]

The specially filmed BBC promo for Day of the Daleks.  I know it's long gone, and that it had the new-look Daleks at various London locations.  Has anyone got more detailed information about it?

The only bit I remember with any clarity is of a Dalek on a bridge (from below the parapet, probably a direct mimicking of the Westminster bridge sequence from DIOE).  Were the other shots as heavily indebted to the Daleks' previous visit to London? 

Not the most vital piece of Doctor Who footage, but it's my first ever memory of the programme and it'd be nice to know more.        

[Leighton Haberfield]

I believe it was broadcast the week before around 28 Dec 1971

[richardwoods]

Vague memory of watching this trailer. Can't remember for sure but there may have been some footage of Ogrons running too. Could be wrong.