Middle Spotted Woodpecker

Can anyone tell me if the Middle Spotted Woodpecker's range has changed recently, and if it would be possible that the bird I was watching in my sycamore tree last week, was in actual fact this bird?  I have cross referenced several books; which all state that it does not visit the UK, however I now beg to differ, as I am convinced that this is the species I was watching.  Please could anybody offer me any info on this matter!  (note the lack of black markings on the head and the tuft of red only)

Many thanks