Whilst I acknowledge that cash is rapidly becoming obsolete, you do occasionally need to carry the blasted stuff - particularly for small rural shops. Whilst on holiday I needed to pay for a fishing day permit by cash which taken from a withdrawal of a larger amount earlier in the week.
Often cash ‘disappears’ through small trivial amounts, but when it’s for a known expenditure it might be useful to account for this within the transaction that shows on the statement - e.g. £50 withdrawn as cash, £15 tagged/categorised as hobbies and the remainder on sweets and beer (general).
That way, when looking at overall expenditure per catagory you’d get a more accurate result.
Does that make sense?