For many procedures in the UK you will be required to undergo a preoperative assessment. This is used to determine your fitness for surgery, and identify patients who might need further investigation or treatment changes before the procedure goes ahead. Read more about pre-assessment here:
https://www.nhs.uk/conditions/having-surgery/preparation/
For patients undergoing procedures at London North West University Healthcare Trust needing preassessment, this can be done online at: https://www.lnwh.nhs.uk/mypreop. You can also find the paperwork needed below.