Where to buy plus size clothing and toiletries?

I'm travelling for work and my luggage was delayed with no sign of it arriving anytime soon. I've called my work travel insurance and they have said I can buy some essentials, including clothes, and will be compensated. I was thinking to go to Columbo shopping centre, but can anyone tell me which stores to look at to buy plus-size clothing as well as toiletries? I know H&M for clothes, but other suggestions would be welcome For toiletries, is there a chain like Boots where I can get all the toiletries in one go - shampoo & conditioner, toothpaste, moisturiser, etc? I have really sensitive skin so I'm looking for brands like Vichy, Avene, that kind of thing.