Hi just thought i'd let you in on my discovery.
Firstly it's probably "illegal" so i'm sure i'm going to get some frowns, but it's better than the alternative.
My DS 3 ASD is fantastic at getting out of his car seat, even after the advice from 18 year old girl at mothercare "you need to fasten the straps really tight" oh my god had never thought of that, cheers!!!
Looked all over for some sort of clip to put round the straps once they are fastened, they have been banned in this country. It's in case of an accident, quick get out!
Bought a group 1 car seat for DD 10 mnts from Netto this week and it came with a red clip thing hanging off it. We have other seats with these on, never knew quite what to do with them. Anyway have worked out you can remove it and clip it round top of arm straps, woo hoo no more escaping.
Also you can use it on the pram straps.
Probably will get shouted at by someone but it is better than him travelling round with the arm straps off!