think it will be first week in may in uk although some internet sites have
it down as april but very little info from canon uk.

In Denmark, most sites seems to stay at 30th april, 1st of may.

One shop where I have an order for long time had 20th april listed, pushed it to 23rd of april, and is now back at 20th april. But I really do not believe this. Retail stores says beginning may.