Mugged by mugger before tax man

[DCT101]

Every week I take my earnings as a sole trader, in the form of cash and cheques, to the bank to pay them in.
As I'm walking along the street it often occurs to me that if I am mugged I will still have to pay the income tax as all the work and invoices are already in my records/accounts. So if I lose £1000 I will have done all that work and be £400 worse off than if I had just stayed in bed.
Is this true or would the revenue look sympathetically [haha] on what hadn't reached my account?

[Incredulum]

You are absolutely correct.

If you were to pay the money into the account, and then withdraw it to buy a new sofa, and were mugged on the way to buy the sofa you wouldn't expect tax relief on your mugging, would you?

[AJHenderson]

Surely you have some sort of business cover in place if your dealing with cash that should something happen then your compensated?

[Incredulum]

Would that help?

Cash insurance receipt taxable, cash lost not deductible?