I don’t have a business loan, but I’ve found this topic which may be of some help:
http://community.quickfile.co.uk/t/accounting-for-loans/1375/2?u=parker1090
And this post may be of some help too, depending on the timing of the loan:
http://community.quickfile.co.uk/t/how-to-record-loans-correctly/4294/4?u=parker1090