If its on this year it's the first week end in September. It's was in Mays Lane Barnet. I believe the date was altered a while ago and then reinstated. If you are interested in a Yorkshire Fair, Lee Gap at West Ardsley is the one. It's a small old fashioned fair, with no stalls selling jeans or plastic rubbish. It's all gypsy orientated and there are some fine wagons its usually on twice a year in August and September. Usually the 17th of September. If it's on Steve I could meet you there.