Shortfall is based on take up by Retail investors, so I'd say...

Shortfall is based on take up by Retail investors, so I'd say good chance there'd be plenty available. Up to the company how they accept. I've found they have a minimum dollar level, not based on your current holding of shares, before they start scaling back. So if you've got a small number of shares you can ask for a lot and be successful.
Thinking about it, Brexit and the Trade War are causing the current risk off attitude of investors and the economy at large. That's why 10 year Bond yields are tanking, giving a false signal of recession as investors head for safe havens. Being a contrarian can be rewarding, but your usually too early to the party.