In 2013 the most popular boy's name was Oliver, followed by Jack, Charlie, Harry and Oscar. Mohammed was 28th, it was only ever briefly top in London, not the country as a whole.
When you remember that firstborn sons in muslim families are always so named, whereas non-Muslims have an infinite number of names to choose from, that will also obviously make Mohammed seem more prominent than it actually is.
I stand corrected and apologize for the error.
Curious how the “Mohammad” name story got legs on this side of the pond.