should the document be signed by an independant witness or will myself and parants suffice
could you please give me some idea how to word the document.
It doesn't have to be terribly formal; try this.
I, XXX XXX, hereby loan YYY YYY the sum of GBP NNNN for ultimate repayment. This loan bears no interest and there is no repayment schedule although one may be imposed by the lender from time to time.
Signed : XXX XXXX
Signed: YYY YYYY
Witnessed by: ZZZ ZZZZZ
Date. : DD/MMM/YYYY
Thanks for the advice. excellent, your help much appreciated.