The other side of the coin from some months ago:
Priti Patel refers Remain campaign to electoral watchdog amid claims it may have breached EU referendum spending rules


https://www.electoral-reform.org.uk/referendum-spending-is-a-murky-world-when-it-should-be-crystal-clear/

The entire situation is confused and Parliament and the courts need to clarify just what is allowable and what is not.