Got it, thanks.  Unless it had simple metal leg rings, I’m confident it was not tagged or ringed.

It’s flown in public displays - same place as several white storks (with green leg rings) have wandered from recently.

Seems likely to be the Dorset bird, as that had moved north between Saturday and Sunday

I saw no transmitter or other tags; I saw both the underside and upper side of the bird.  I am confused, however. If the bird escaped (from a collection?) why would it have a transmitter attached?

Any sign of transmitter, as an escaped bird was in Cornwall last week?

Don’t know any details of the one in Dorset at weekend.

At around 1030 this morning I saw a single kite over the moor.  I assumed it would be a red kite since I see two or three there most years.  However, although this bird had the typical flight jizz of a kite, it had much darker plumage with no rufous in the wing or the tail.  The tail was grey/brown and while it was forked the depth of the fork was far shallower than that of the typical red kite.  I judged this bird to be a first year bird since it appeared to have fresh plumage throughout with no missing or damaged light feathers.  The underwings showed a pale patch at the base of the inner primaries but, unlike a red kite where the similar patch appears almost white, the colour of the patch was pale greyish and less distinct than the red kite.  The upper wing coverts were pale which is typical of first year birds. 

The bird flew off and despite another 30 minutes scanning the vicinity, I could not relocate it.

In conclusion, a black kite.

I watched the bird for around 2 minutes at a distance of 100-200 metres and about 50 metres height.  I was using 8x32 binoculars.  The light was good.  No photos.

Earlier, I saw a single Dartford warbler near Pitt Bridge.  Another unusual sighting as it is well away from typical habitat.  However, I recorded one there on 17 December 2020.