My biggest observation was that slim fit even in the sales brochure just looks like a suit that doesnt fit. And extra slim fit looks even worse!
Regular fit if you dont want to look like you borrowed someone a size smallers suit!
Well that depends on the individual, a good fit is a good fit. Nothing worse than a billowy shirt flowing over a paunch or a slim flitting shirt stretching over somebody who isn’t slim.
Also need a pair of smart brown leather shoes. I don’t think I need/want bespoke hand made, but I do want something a bit special which will last a long while. Say £150 budget?
You get what you pay for, Northampton made Goodyear welted shoes from the good manufacturers will last many years and be re-solable, I would put a topy sole on the fronts though to stop accelerated wear and slipping. I have tried many and now only wear Trickers as grensons/loakes just didn’t last and some are made in India, Barkers or sanders would be a slightly cheaper alternative but I doubt £150 would get the quality you want.
Colours? Dark navy blue is a classic choice, single breasted with two buttons. White shirt, subtly patterned tie in another colour (knitted burgundy? Silk of course) and black Oxfords shoudl do you well.
For an interview….
Have a look round the web for styles/looks that you think will work for you and then find it replicated by the department stores. It’s not that difficult.
Follow the basic rules about not having a matching pocket square/tie and only having one dominant accessory colour (tie/socks/square/shirt colour but not all of them)
Don’t scrimp on the shoes! You can get away with a cheaper suit but rubbish shoes kill whatever other effort you have made.