It is obviously very sensible to count post NPPL or LAPL hours, but If the CAA really mean that why don't they change the wording in CAP 804 and the SRG1125 form? Both of these documents very clearly state that the hours are post PPL
In form SRG1125 you need to fill in a box annotated as "Total experience as pilot of aeroplanes (following valid application for issue of PPL)." If a candidate listed hours flown since the issue of an NPPL in this box it could be seen as "false representation" which is a very serious matter, as the form goes on to make clear.
"It is an offence to make, with intent to deceive, any false representations for the purpose of procuring the grant, issue, renewal or variation of any certificate, licence, approval, permission or other document. Persons doing so render themselves liable, on summary conviction, to a fine not exceeding the statutory maximum (currently £5000, or in Northern Ireland £2000) and on conviction on indictment to an unlimited fine or imprisonment for a term not exceeding two years or both.".