Bird of Prey in London,UK (1 Viewer)

I was in Regents Park,London,UK on the 18.05.17 and noticed this bird of prey several hundred metres in the sky coming from north heading south east. It was hard to make out but I was lucky enough to manage to take some shots before it vanished into the clouds. Initially I was quite sure that it was a Hobby due to the long tail and swift like appearance in one of the shots. Upon closer inspection I noticed its tail was more triangular than anything and its wings quite rounded. It was hard to make out colour but appeared to be a light brown and it also circled several times before soaring off. Especially due to the time of year I was hoping it may be a Lesser Kestrel. I don't think any have been reported here before but have been reported around the nearby Hamstead Heath area previously. I have attached multiple photographs to assist in identification. Any ideas would be greatly appreciated.

Many thanks in advance,
Malachi

Last three are common kestrel. 2nd looks more like sparrowhawk. Are you sure they are all the same bird?

Sorry, all pics IMO show a Kestrel.

Peter

A Sparrowhawk had passed by roughly 30 metres high whilst this bird was soaring high in the sky. However none of these photographs are of the Sparrowhawk as I photographed it seperately. I had followed the bird with my eyes through the sky and I am quite sure all photographs are of the same bird. As seen in the 4th attachment? It looked very Hobby like. The way it differs in appearance is what made me question its identity

Definitely common kestrel then - I think the number of lesser kestrel sightings is *very* small.

Definitely Kestrel.

Thankyou for the help