Ouch, Danny. Sorry. But like that other guy says, it's unfortunately so common in this industry not to get paid for three months that it passes unnoticed until they vanish. Nonetheless, I think you should submit another copy of all the outstanding invoices to their accounts dept with a reminder that interest at base rate plus 8% is due on invoices over 30 days and get one of us London types to follow up for you if they ignore you.

wg