It would indeed add up to that amount of profit in the UK. What is unclear however is that given the company is a wholly owned subsidiary of an Irish company, what did the Irish company make? Corporation tax is circa 12.5% in Ireland and substantially higher in the UK 19% and probably heading higher. If I was them I would be importing in Ireland and transfer pricing out to the UK, thereby keeping more of the profit in the lower tax rate country, all the large companies used do it like Apple for instance, but i am not sure if Brexit has hampered that "tax planning" in anyway
I am glad they are making a profit- selling fabulous models at cheaper prices than the competition. I like their customer service, and their availability to the enthusiast. I for one think the hobby has been better served by having them in it.