Oh dear sounds like your young friend needs some serious guidance.
Weaners for the butcher need a metal tag or slapmark for slaughter, for this she will need a herdmark. The easiest way would be to find somebody local who already had the taggers which she could borrow and disinfect before and after using. Tags have to be ordered try Fearings think you can order individual ones. For a few pigs a slapmarker is probably too big an expense.
The pedigree Berkshires, hmm, I presume our young friend is not in the BPA therefore you will need to check if the pigs are still listed as registered as a recent breed survey was done and any not accounted for by BPA members are generally 'killed' off the register. If they are still on the system they can be sold as pedigree but they will have to inform the BPA of the change of ownership. The paperwork they have for them is very important, without it they're just black gilt pigs! If they have been killed off they will need to contact a Berkshire pig BPA rep to try to help get them reinstated but if they are untagged, untattoed or notched it is unlikely to be successful.
Hope you can convince this person to shift these pigs before they start interbreeding with each other as this will now be the main worry given their age so swift action is really needed.
HTH
Good luck. Its very good of you to offer assistance.
Mandy