Not sure what "scrat" means, but if it means referring to an established tome to which many PI lawyers refer, then yes. Also unsure what FFS means.
Keep your knickers on; the solicitor is not being forthcoming about how he has established his view on the damages, so I am keen to seek well established evidence for myself.
"Scrat" - Yorkshire/Lancashire term for grubbing around for, e.g. 'scratting around for coppers down the sofa'
"FFS" - I thought everyone used that. 'For ****'s sake'. [Aagh, I've been autocensored.]
If this is your solicitor, why are you employing someone that you don't trust and then trying to second-guess him with your own inexpert research? Just ask him to explain it to you.
If it's the defendant's solicitor, why aren't you employing someone to represent you who knows what they are doing? I'm sure I can find the up to date domestic wiring regulations on a website somewhere, but that doesn't mean it would be sensible for me to print it off and do my own wiring.