How many Typhoon units please?

I was just wondering how many RAF Tyhpoon squadrons there are going to be ( sorry if this has allready been said) Am I right in thinking they will be at Conningsby, Leuchars? and where else? Which units are due to convert also
3, 11 ?????
Will any of the old Jag units convert to the Typhoon or are 6 and 54 now gone?