Here is a Cat 4 checklist from 2 years ago. Needs updating.
Cat 4 Checklist
13.16 Lanyard for bilge pump handle.
13.19 Two stout buckets with lanyards.
15.11 Tools including hacksaw with 10 blades, plus hammer and drift.
15.19 Sail repair kit
16.15 Suitable containers for water
17.02 Two fire extinguishers
17.05 Life jackets, one for each crew, with whistles and reflective tape. (no crotch
17.08 Harnesses, and tethers. (50% of crew).
17.13 Lifebuoy, with drogue, whistle, reflective tape, self igniting light. Inflatable must be
serviced and in date.
17.14 Heaving line 16m.
17.15 Emergency knife near cockpit.
17.29 One anchor, chain = boat length, warp = 40m.
18.2 Handheld VHF radio.
18.7 Flares < 3 yr old: red parachute x1, red hand x2, white hand x1, orange smoke x1.
18.8 Two flashlights (one floating, waterproof, spare battery and bulb).
19.03 Local tide tables. Marine charts. Plotting equipment
20.08 22 litres engine fuel.
20.16 Soft wood tapered plugs, attached to each skin fitting.