Would this be good enough, plus covers the requirements?

If so I aim to take it into work Thursday and get my boss to write it up.

To whom it may concern,
Slip has worked for company name as a job name since Length of service on a permanent basis.
His Salary is £……… a year and has been paid this amount since ……..

If you have any questions regarding Slip's employment with Company name, then please do not hesitate to contact me on ………..