The list does seem a bit dated and like something they have been issuing since the day dot.
1 heavy hammer (1.25 kill club or limp hammer)
>> think I'd wait till I started to see if one is needed
1 pair of insulated combination pliers
>>
Here I hardly use pliers at all, everyone has and develops their own techniques
1 hacksaw frame (suitable for 300mm blades)
>>
Here, over a tenner cheaper than toolstation
1 junior hacksaw
>>
Here, struggling to think last time I used one
1 clasp knife
>> Sorry no idea where to get that, I use a stanley knife
1 spirit level (225 or 250mm)
>>
Here
1 plumb bob line (200gms) no idea what this is if I'm honest
1 chalk line(15m)
>>
Here, it does both. Although a tad messy at the former
1 pair foot prints(225m)
>>
Grips should suffice
1 claw hammer (500gms)
>>
Here
1 flooring chisel(55mm)
>>
Here
1 Bradawl (medium)
>> Never actually used one to the best of my knowledge!
1 5m tape measure (19mm wide?
>>
Here, better to go to 8m imho
here