Records of changed work are strongest when made while the details can still be checked. A dated photo with a place and change code is more useful than an image no one can link.
If the record is needed next month, can someone else find it?

Link Construction Site Records For Variations To One Code
Use it on the instruction, drawing, site note and cost record. Show how the work differs from the scope first planned.
Record labour, plant, materials, waste and abortive work by date and task. Note access problems or sequence changes where they affect the work.
Check Facts In Good Time
Ask the site lead or other party to check the record while it is fresh. Keep facts seen apart from assumptions or later estimates.
A signed daywork sheet may confirm hours without agreeing the price or right to payment. Check what was signed and the terms before relying on it.
A photo shows the work. Can it also be linked to the hours, instruction and price?
- Instruction
Keep the request, date and scope change.
- Site facts
Link place, photos, hours and goods.
- Cost record
Trace rates and sums to their source.
Use the same event code across the sources so the commercial record can be checked.
Share What The QS Needs
Send indexed records before the next claim or notice date. Keep source files and show why a record was later changed.
Agree who records each fact and when it is needed. More files do not always make a stronger case; clear links between cause, work and cost help the review.
General guidance. Check your signed contract and the job facts. Get legal advice where needed.