Check list of things to bring on the course:

Waterproof clothing and shoes (just in case, it is Wales) along with anything you may need medication wise i.e inhaler etc.

1. Packed lunch and drink.
2. Manual for your camera.
3. Spare batteries for your camera.
4. A tripod.
5. Spare memory cards.
6. Some sample images for us to review.

That really should cover all of the basics, and if possible all you camera kit including lenses.