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It would be useful if you could both explain the reasons for your ids
here's my Gooden's bee http://www.ispot.org.uk/node/256653
and my Ectemnius http://www.ispot.org.uk/node/267313
you could start by comparing the antennae, wing colour, leg colour and so on. Nomad bees feed on the food store of Mining bees, your wasp catches hoverflies and fills it's nest with them. A more impressive animal, I think. I particularly like the square shape of the head which reminds me of a modern inter-city coach..
There are 10 Uk species of Ectemnius, which you need a hand-lens at least to tell apart. Probably E. continuus as it's the commonest.
latest pics and diptera videos
On the original images it is possible to see the punctuation on the thorax and the antenae segments which seem to be the distinquishing features - I've added a full face shot which you may enjoy
Lat/Lng: 50.72, -1.848
OS grid ref: SZ108911