I'm no Tarzan physique nor fashion guru but...Gap chinos or similar for work with a half decent shirt. DM's or decent Loafers.
Chinos also good for casual/hols so very useful. Polo shirts for non-work occasions from cheap to Fred Perry and a fee dec nt wool jumpers.
I have 1 pr proper trousers and Ted Baker blazer for smart and agree that a pair of Loakes or similar are a good investment.
Tesco jeans are remarkably good too.
Otherwise I tend to wear shorts all the time when not working from Ted Baker, Vans, various 'go-outdoors' types too.
Vans sneakers or similar cover a range of occasions.
Most if the time I share the 'man at
Millets' look with fleeces etc and a pair of walking shoes from the likes of
Decathlon and GO.