Ask HN: Paypal Pro rejection - any ideas?

We have a client in the UK fashion industry who is established (running for around 10 years), with no debt, registered with companies house, HMRC etc.. and we're working with them to set up a new e-commerce site.

However, PayPal have rejected their PayPal pro application without giving a reason and have said to re-apply in 90 days. This is quite a big problem as it's going to delay the site go live whilst we set up a different solution (Paypal basic or another gateway). PayPal not providing a reason is infuriating as we don't even know what to do differently next time. Does anyone have any ideas on why this would be? Cheers.