Often, people trading through a limited company will say “I am a limited company”. They are not a limited company, they are a human who owns a limited company. Their accountant should keep picking them up on it and correcting them, not to be pedantic, but because cementing the difference in your mind is important.
Company owners early in their “journey” (sorry) will often ask “can I claim cost X?”. A better perspective is to think “is this a cost which should properly be paid by my company?”. The rent on the Fizz offices isn’t somehow “claimed” against tax. Fizz just pays it, obviously! Fizz doesn’t “claim” the salaries of our staff. It pays them. Equally, when the directors are out and about travelling for meetings and the like, we just pay for our train tickets with a company debit card to begin with, straight out of the company bank account. Job done. There’s no reason, in the limited company world, for the word “claim” to be used, other than in the specific context of employees making formal expense claims for things that they’ve necessarily paid themselves and need to be reimbursed for.
Companies don’t claim things, they pay for them. If you can separate the company and yourself in your head, then life becomes a lot easier.