Yes, but I would say France first, then England.
According to CIA's World Factbook; In France; Roman Catholic 83%-88%, Protestant 2%, Jewish 1%, Muslim 5%-10%, unaffiliated 4%
In United Kingdom; Christian (Anglican, Roman Catholic, Presbyterian, Methodist) 71.6%, Muslim 2.7%, Hindu 1%, other 1.6%, unspecified or none 23.1% (2001 census)
You're probably right about France. I was thinking that England seems to be the political hub for the Muslims in Europe