What can I use to verify my income as an employed barrister?

We will consider a variety of different documentation types as evidence. The following list is not exhaustive and includes: the official tax documents such as P60 or P45, a contract of employment or letter from your employer. If you have other earnings, the evidence you could use would be similar to that that HMRC might need to validate gross income. 

Alternative documentation may be used for those not employed in the UK including statements of earnings from partnerships, accountants, or employers.