Massimo Dutti is a worldwide chain – with a large London branch in Regent Street. From outside, you’d think that suits would be £700+, but you’d be surprised.
I recently bought my wedding suit here – and it was a very reasonable £270. A lilac shirt was similarly reasonable at £42. They also sell jumpers, wonderfully soft leather jackets, shoes and most “smart” clothes and accessories.
They also had a watch at £95 I was very keen on – but I suspect it was quartz, and I am too lazy to get the batteries replaced on quartz watches I currently own!