Ahh the old push it through from the rear trick
Ta very much, it has 3 clips in total, 2 underneath. The plastic holding clips have gone brittle and let the spring clips fall out. I've superglued a couple of thin plastic pieces to stop the clips going to far back and dropping out again.
I'll give it an hour and see if its enough to hold them, if it doesn't work I'll dig out the JB weld