I was emailed by Nina (who has a fabulous blog by the way) who alerted me to a shop in Sweden called Lagerhaus, which is selling products with blatant copies of my illustrations on them.
They say that imitation is like flattery but when you're in that situation yourself it's very hard to see it that way! So I'm taking action as I type but if anyone has any other pointers they would be most appreciated :)
A big thank you to everyone who has sent messages of support too, it has restored my faith! xxx