https://www.slab.org.uk/faqs/identification-parades-solemn-proceedings/
If the parade is attended by an unqualified person, or for some reason the parade does not proceed then the fees prescribed under regulation 5 do not apply, and payment reverts to the detailed fees prescribed in Schedule 1.
If the identification parade does not take takes place during the period where the inclusive fee under Part 2,paragraph 1, applies only the travel fee would be chargeable over and above the inclusive fee.