Arguably it has to be a cast at this time of year, medium small perhaps 10,000 bees? However this has been a very strange year with nearly all swarming coming to a dead stop when the OSR finished, (or thereabouts, end April), followed by a period of a few weeks with no forage in May - not normal. Prolonged spring / early summer drought until July when we were plunged into late autumn and has been all over the place since.
Captured by jamming box between branches above swarm and then smoked them up into it, takes a bit longer but same end result.
Chris