Starting a business here is easy.
Growing a business here is harder.
You want an office? Welcome to the wonderful world of business rates, commercial lettings, site security, ever-changing transportation and infrastructure arrangements that will be largely out of your control, etc.
Hiring your first employee? Welcome to employment contracts, documenting policies for things like grievances and disciplinary actions that you hope you'll never need, arranging pension plans, H&S regulations, statutory leave, benefits rules, and all the other HR fun and games.
Providing a service online, where your customers might come from abroad? Welcome to international tax regulations that you can barely keep up with, never mind properly comply.
Don't want to have users steal back all the revenue you ever took from them based on a legal technicality? Better have a good lawyer to write all your documents.
Don't want an intervention by the data protection regulator? Better make sure all your GDPR compliance processes and documentation are up to standard.
Remember to file your real-time payroll data and VAT returns and confirmation statements and annual financials on time. Don't forget you'll need to use suitable online systems for a lot of this stuff now, since HMRC insist on it, and you'll need to get anything else you're using for financial management integrated with them.
Don't forget your public liability insurance. And employer's liability insurance. And professional indemnity insurance. And property insurance. And...
Now, you can outsource a lot of this work. For some legal and accounting matters, you will have little choice, unless that happens to be your field of expertise. But of course the services offering to do it for you will charge you, and even if it's just a thousand pounds here or 3% of your revenue there, it will soon add up. Until you're big enough to have in-house people for things like HR, facilities management, IT, legal and financial, that's how it goes.
Now, run along and make sure your designated H&S officer has checked that all your employees currently working from home have suitably ergonomic workspaces set up, recent sight tests done and glasses/contacts provided if they're working with computers, and proper reporting in place for all the extra expenses they'll be claiming due to the sudden home-working this year, because you could be on the hook for a big bill if you get any of that wrong.