Walking boots and a breathable waterproof jacket are probably the only main requirements.
Bring clothes for warm and cooler weather which you can layer up as appropriate.
You won’t need to carry too much – don’t forget, we transport all your luggage and we’ll let you know where there’ll be places for snacks and meals along the way (a packed lunch is necessary however on some days of some walks). We think you’ll find a day rucksack is probably ample.
When it comes to boots, it tends to be down to personal preference and common sense: some people like boots with good ankle supports, others prefer lighter shoes. Do make sure that they are waterproof though and worn in.