Steve Monnington of Mayfield Media Strategies runs the rule over the latest global exhibition deals. In last month’s column, I talked about the speculation that UBM would acquire Allworld for around US$400m (approx. £316m). It turns out that UBM are the successful bidder, but because of the high level of interest from both trade organisers and private equity firms, they had to pay $485m, making this by far the l...