Looking through the firm's website
http://www.willow-wealth.uk/
it quickly becomes clear that it's actually a one-man business, run by a financial adviser (Paul Adair) from his home in Northern Ireland. So he's not actually providing any investment products, simply advising upon them.
Most of what's on the website seems 'kosher' to me but I am concerned that he claims to be a Chartered Financial Planner. That title can only be awarded by the Chartered Insurance Institute but neither his own name, nor that of his business, appear on the CII's directory:
http://www.cii.co.uk/web/app/charteredtitle/FSSearch.aspx
Given that the products offered through Willow Wealth Management will be available elsewhere, I'd advise finding another adviser.
(PS: I've emailed the Chartered Insurance Institute to let them know that either their database isn't up to date or else Mr Adair is using a title which he isn't entitled to).