They still list more than a million pounds in assets, 50k in cash, and have been around for 13 years. A bit much for a "side gig".
£2.8 million in turnover in 2018 though, £2.1 million of that from outside the UK.
There's also a parent company (Hadleigh PVT Limited) that indirectly owns the business. And the parent company paid £192k in rental income to Gray & Farrar in 2018. It is all quite weird, e.g. in 2013: "strategic marketing and business promotion costs have been charged at arms length by a business wholly owned by one of the partners"
2016 accounts say the principal activity was matchingmaking services.