Supermarket giant Tesco this week found out that blocked condensate drains have a very real cost, with an eye-watering fine of £733,333 – almost three-quarters of a million pounds – after a customer slipped and broke their hip in their Hemel Hempstead store.

Tesco received the fine, which is still set to rise further, when costs are added, at Luton Magistrates Court on 24th January for breaching The Health and Safety at Work Act by not ensuring customers and staff were protected from risk.

The fine relates to …