Watts Bank is a 1.9-hectare (4.7-acre) nature reserve south of Lambourn in Berkshire.

It is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.

[2] It is designated a biological Site of Special Scientific Interest as White Shute.

[1][3] Watts Bank is a small chalk grassland bank.

It has had over 30 butterfly species recorded.