Descriptions of good practice only get you so far. What follows is the same material written twice — once the way it usually arrives, once the way it clears review — with the reason the second version works.
The examples are composites of the patterns we see repeatedly, not any real document. The job in each case is the same: replacing rooflights on a two-storey warehouse roof in an occupied unit.
Scope of works
Before
"Removal and replacement of rooflights to warehouse roof. All works to be carried out in accordance with manufacturer's instructions and site rules."
After
"Removal and replacement of 14no. GRP rooflights to the north pitch of the warehouse roof at Unit 4, Meadow Industrial Estate. Roof is profiled metal sheet with fragile rooflights at 6m centres, eaves height 7.8m. Works carried out over 4 shifts, Monday to Thursday, 07:30–16:00, while the unit below remains occupied and operational. Access via 26m telescopic boom MEWP positioned in the yard to the north elevation. Sequence: establish exclusion zone below, install crawler boards and edge protection, remove existing units one at a time, cover opening immediately, install replacement, seal and inspect."
The second version has already generated its own hazard register: fragile surface, fall from height, falling objects onto an occupied unit, MEWP ground bearing, work over a live business. The first version has generated nothing, which is precisely why the hazards under it will be generic. This is the difference described in generic versus site-specific RAMS.
Hazard identification
Before
"Working at height. Manual handling. Weather. Slips, trips and falls."
After
"H1 — Fall through fragile rooflight during removal or when covering the opening (roof workers). H2 — Fall from roof edge, north pitch, no permanent edge protection (roof workers). H3 — Rooflight unit or tool dropped through opening into occupied warehouse below (unit staff, 9 people working directly beneath the north pitch). H4 — MEWP overturn: yard surface is unbound hardcore over made ground of unknown bearing capacity. H5 — Manual handling of 1.8m × 0.9m GRP units at height, two-person lift. H6 — Wind loading on GRP panels during handling, acting as a sail. H7 — Working alone on the roof if the second operative descends."
Numbered hazards can be referenced from the method statement stages, which is what lets a reviewer trace a control without hunting. Each one also names who is at risk, including the nine people downstairs who never appear in the "before" version at all.
Control measures
Before
"Operatives to wear harness at all times when on roof. Take care around fragile surfaces. Ensure area below is clear. All operatives to be trained and competent. PPE to be worn: hard hat, hi-vis, safety boots, gloves, harness."
After
"H1 — Work carried out from the MEWP basket wherever reach permits, so the fragile surface is not accessed. Where roof access is unavoidable, 600mm crawler boards spanning a minimum of two purlins, positioned by the supervisor before access; openings covered with a fixed 18mm ply cover screwed down immediately on removal of each unit; no unit removed until its replacement and cover are at roof level. H2 — Free-standing counterweighted edge protection to the north verge, installed and inspected by [named subcontractor] before first access, with handover certificate held on site. H3 — Ground-level exclusion zone of 6m from the building line, physically demarcated with barriers and signage, and the corresponding floor area inside the unit closed off by the occupier's facilities manager (agreed in writing 3 July); tool tethers used for all hand tools; no materials stored on the roof surface. H4 — MEWP siting on the yard confirmed by ground assessment; 1200 × 1200mm spreader plates under all outriggers; siting checked by the supervisor and recorded on the daily plant check. H5 — Two-person lift with a mechanical aid for positioning; units delivered to roof level in the MEWP basket, never carried across the roof."
Every control names what, who and when, and each one could be verified from the ground. Note also what the "after" version does with PPE: the harness has moved from the first line of defence to a residual measure, because avoidance and prevention are now doing the work. That ordering is the requirement set out in the work at height RAMS guide.
Residual risk
Before
An empty column, or every row reading "Low".
After
"H1: initial 5 × 5 = 25. With controls: 2 × 5 = 10. Severity remains 5 — a fall through a rooflight is potentially fatal and no control changes that — but likelihood is reduced to 2 by working from the basket and covering openings immediately. Residual risk accepted by [named competent person] on the basis that further reduction would require full scaffold access, which is not reasonably practicable for a four-shift programme on this structure. H3: initial 4 × 4 = 16. With controls: 1 × 4 = 4."
The second version does the thing residual scoring exists for: it states a judgement, gives the reasoning, and names the person who made it. It also shows severity staying high, which is honest — controls reduce likelihood far more often than they reduce consequence.
Emergency arrangements
Before
"In the event of an emergency, dial 999. First aider on site. Muster at the designated muster point. Nearest hospital: local A&E."
After
"First aider: [name], mobile [number], on site for all shifts; second first aider [name] at the occupier's front office. First aid kit and eyewash in the site cabin, yard level; defibrillator in the warehouse reception, ground floor. Muster point: the marked area at the south end of the visitor car park, agreed with the occupier and shown on drawing SP-02 rev C. Nearest A&E: [hospital name and full address], 4.2 miles, route printed and held in the vehicle. Rescue from height: casualty in the MEWP basket recovered using ground controls — [named operative] trained in emergency lowering, controls unlocked and accessible at all times. Casualty suspended in harness: recovery within 10 minutes using the rescue kit stored in the MEWP basket, [named operative] trained; the second operative raises the alarm by radio to the supervisor, who calls 999 and meets the ambulance at the yard gate."
The "before" version is what a copied document looks like, and it is the section most often copied. The "after" version is the one that helps somebody on the worst day of the job.
Sign-off and version control
Before
A signature, no date, no revision number, no reviewer.
After
"Prepared by [name, role], 2 July. Reviewed by [name, SMSTS, role], 3 July. Approved by [name, role], 3 July. Revision 2 — issued following principal contractor comment on exclusion zone extent; revision history overleaf. Briefed to all operatives 6 July, signature sheet attached."
The pattern
Across all six sections the change is the same: the "after" version could only have been written by somebody who knew this building, and it can be checked by somebody standing in the yard. That is the whole test, and it is worth applying to your own documents section by section.
The mechanical half of that check — blank fields, hazards that do not match the scope, controls that are exhortations, a missing rescue plan — is what an automated pass finds in a couple of minutes, and understanding your report explains how those findings are ordered. Whether the method is the right method for this roof stays with your competent person, which is exactly as it should be.
This article is general guidance on UK construction documentation practice. It is not legal advice, a compliance certification or a substitute for review by your own qualified health and safety personnel, who remain responsible for deciding whether any particular document is adequate. See our disclaimer.