Not sure consular services will be able to help much.
They no longer issue regular passports. They can issue an emergency travel document to allow a person to complete a trip but its use is strictly limited until a proper new passport can be issued.
And when it's issued they put details of your trip on it.. A friend of mine had one after they lost their passport whilst abroad. It meant they could finish their cruise and get back home to the UK and it was retained by UKBF on landing at LHR.
It costs £100.
https://www.gov.uk/emergency-travel-document