Sports bettors will be in their element later this month as the three finals of UEFA’s club competitions are staged in the space of 11 days. English teams have reached the finals of three different European competitions in the same season for the first time, but only two of them are the bookmakers’ favourites to lift a trophy. Arsenal will have their work cut out against Paris-Saint-Germain in the Champions League, but it should be a different story elsewhere. Aston…