Can you give me a run down of the incorrect interpretations on the report,
On the first one:
1 Rewirable fuse board needs replacing C1
Not a valid comment, reasons need to be given. Rewireable fuseboards are still valid in BS7671, although it's very unlikely one would be installed today.
2 No rcd protection C1
At worst, that's a C2, and most would be a C3.
3 Single socket smashed needs replacing. C2
One of the few instances of a C1, as live parts likely to exposed.
4 4.8 Manual operation of circuit-breakers and RCDs to prove disconnection (643.10) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Unclear what they mean, presumably that one or more circuit breakers / RCDs doesn't work, as in it doesn't disconnect when switched off. Not impossible but a very unlikely situation, and even then it's a C2. As the installation has a rewireable fuseboard (item 1), it presumably refers to an external RCD of some kind.
5 4.9 Correct identification of circuit details and protective devices (514.8.1; 514.9.1) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Probably lack of circuit labels or other information. C3. Not dangerous. Fixed by adding the appropriate labels or circuit charts.
6 4.10 Presence of RCD six-monthly test notice at or near consumer unit/distribution board (514.12.2) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
A label is missing. C3.
7 4.18 RCD(s) provided for fault protection - includes RCBOs (411.4.204; 411.5.2; 531.2) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
RCDs for fault protection only applies to TT supplies, which is the most uncommon option. C2 if applicable, which it isn't as they have indicated it's a TNCS supply.
8 4.19 RCD(s) provided for additional protection/requirements - includes RCBOs (411.3.3; 415.1) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
RCDs are required for almost all circuits now, lack of RCDs is common, but is C2 at worst, C3 for most.
9 5.6 Coordination between conductors and overload protective devices (433.1; 533.2.1) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Implies that there are circuits wired using conductors that are too small, such as using 1mm² T&E for a cooker circuit. As they haven't provided any information as to the circuits, it's safe to assume this is a pack of lies. C2 even if it was applicable.
10 5.7 Adequacy of protective devices: type and rated current for fault protection (411.3) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Same as previous item, very likey made up, and no evidence to support it.
11 5.8 Presence and adequacy of circuit protective conductors (411.3.1; Section 543) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Lack of protective conductors most often seen on very old lighting circuits. C2 if that's the case, and only usually seen on lighting circuits installed before 1966.
12 5.12.3 For cables concealed in walls at a depth of less than 50mm (522.6.202; 522.6.203) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
Lack of RCDs again, normally C3 or perhaps C2.
13 5.12.1 For all socket-outlets of rating 32A or less, unless an exception is permitted (411.3.3) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
No RCDs for socket outlets, C2 if they can be used for items outside, C3 if not.
14 5.12.4 For cables concealed in walls/partitions containing metal parts regardless of depth (522.6.203) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
No RCDs for cables in the walls. C3, some might put C2. Depends on the circumstances.
15 5.12.5 Final circuits supplying luminaires within domestic (household) premises (411.3.4) is in a dangerous condition and presents risk of injury. Immediate remedial action is required. C1
No RCDs for lighting circuits. C3.
Part 10 should have the serial numbers of the test equipment, not the word 'YES'. Unknown why they have filled in a device for testing earth electrode resistance when there isn't one.
Part 11 - Nominal voltage can't be 230 and 240 at the same time. PFC is most definitely NOT 627kA. 0.627 is possible, or 6.27 perhaps.
1362 fuses are used in 13A 3 pin plugs. Not for the supply to a property, they are not type gG and they are not available in 100A, and don't have a short circuit capacity of 6kA either.
Part 12 - 'MCB Obsolete' is not a valid standard for a main switch, and it's desperately unlikely that it's an MCB. It might be a 100A as stated, but it will NOT have a setting of 80A or anything else.
Part 15 - mostly just tick boxes relating to the others, however 5.18 should not be ticked, as that's the condition of accessories, such as the smashed socket outlet referred to earlier.
Part 16 - should be completed with details of all of the circuits. Even if no testing was done, there should still be a list of the fuses/circuit breakers and appropriate ratings and the size and type of conductors connected to them.
It's 100% junk. The person completing it is either totally incompetent, a charlatan, or both. You should not pay anything for it.