sadly there are NONE on Friends Reunited which surprised me. So am guessing not many!!
However, there are plenty of Mike Hunt's and Eileen Dover's rofl, and one Ivor Biggun.
I've just looked in the Leeds & District phonebook and sadly there's noone at all called Nowadays, which I'm really disappointed at.
However (US Statistic) 3.271% of men are called John, and there are 29.8 million males in the UK, so if name popularities are the same then there should be 974758 Johns in the UK.