Toymaster is an umbrella association in the UK which brings together "local and independent" toy shops in order to give them bulk buying discounts with suppliers - its a way for little shops to keep prices within a reasonable distance of the big multinational toy retailers and supermarkets. Some of the retailers who are members brand themselves as Toymaster stores whereas others keep their independent name/identity and simply are part of the scheme.
The Toymaster fair is a way for these retailers to see the new lines from suppliers - its this week [22nd to 24th May] and its in lovely Harrogate in the UK! I would strongly suspect it will be pretty much the same line up as was at the NY Toyfair as we run 6 to 12 months behind in toy launches in the UK and always have done.