The NHS Cervical Screening Programme in England provides evidence based guidleines for colposcopy and programme mangement which are used through out the UK. Clinical services may have local protocols but most practice is based on the guidelines of document 20.
Guidelines are developed and edited by UK colposcopy experts based on literature search and review and grading of available evidence.
Quality assurance varies throughout the UK but each country has adopted a system which included key performance indicators based on the national guidelines to ensure quality of care for women which balances benefits and disbenefits of screening.