This list is not exclusive but is a good start. In summer you may decide not to bring waterproof trousers, but a jacket that is at least wind proof should always be carried as the weather can change in England even Surrey so be prepared. It can be very windy on hill tops, whatever the weather lower down.
- Hat or balaclava (optional)
- gaiters (optional)
- jacket - water and wind proof
- gloves
- trousers (carry some if you wear shorts)
- thick socks (thin inner socks can help)
- walking boots (recommended), or strong supporting shoes
In backsack / daypack
- waterproof trousers
- one more jumper/fleece than you expect to wear (in winter take more layers)
- enough food
- enough drink
- basic first kit aid (including plasters if prone to blisters)
In the summer
- sun hat & lotion
- extra drink