Agreed, I gave up on trying and ended up just ordering a bike from Halfords.
Excellent commuter. Upright position for visibility, bit of suspension for the off road bits, chunky tyres for the dug up tarmac, and Schrader valves so easy to slime and top up air from anybody with a car pump.
Decathlon website is a joke, everything is magically out of stock at 11 pm.
Says this has 28 inch wheels, is that too much for a 5ft 12 year old? For some reason I thought the recommended was 24 or 26 inch? Thanks for any advice. Not very clued up on bike sizing!