My 4.9 year old starts school next week and all the trousers I’ve tried on him are far too long. Is this just par for the course or can I find some for shorter legs? The M&S trews fit round the waist but are about 4 inches too long. My mum would normally take them up but she’s in hospital right now so I’m scrambling around for a last minute replacement. I’d appreciate any help, thank you!