With a name like Flanagan, sounds a tad Irish.....which means you should get along just fine here

Just wondering where the best windsurfing spots are around Britain, looking at my next trip? I notice you own windsurfing Gidget (Beth Williamson) comes from Liverpool, and she apparently sails on the Mersey and River Dee? How is the Portsmouth area? I know Cornwall is good for surfing, but do they windsurf there too? Don't worry about offshore winds, how do yo cope with the massive tides?
I noticed that windsurfing (and surfing) was big in Ireland, especially around Sligo.