News update, 15th September.
Following an explosion in a Cafe at Sainsbury Supermarket on Tuesday, the coffee trade has been reminded of its responsibility for due diligence of the maintenance of espresso machines and other containers of extremely hot water.

Boiler Saftey Tests Needed - After Machine Explodes
The first to respond from the trade so far has been the Coffee Council, which has said that although such incidents are so rare as to be virtually unheard-of, all caterers using espresso machines must remind themselves that they are using extremely sensitive pieces of equipment, for which servicing schedules and boiler-inspection procedures must be followed.
Details of Tuesday’s incident are still not entirely clear, although it is now generally accepted that at around 12.25pm in the café of Sainsbury’s in the Queensmead shopping centre, Farnborough, an explosion occurred, as a result of which several people were taken to hospital and others treated at the scene.
Various media reports give different numbers of the injured; it has been reported by several media that one lady has been detained in hospital with injuries to eye, face and neck. The news media reported the event with different degrees of drama, one referring to ‘panic’, and one referring to a coffee machine being ‘hurled across the café’ by the explosion. An eye-witness said on television that ‘the ground shook’.
Although first reports referred to an ‘industrial coffee machine’, the machine in question later turned out to be a conventional three-group traditional espresso machine, typical of the machines used in every high-street specialty coffee-house.
The aspect of the story has puzzled some of the trade is contained in a statement from Sainsbury’s, which said: ‘seven people sustained minor injuries when a pipe in a coffee machine at our Farnborough store ruptured this afternoon’. A reporter on local television later said: ‘it was one of the pipes leading into the machine which ruptured, causing the explosion’.
In reply to questions on this, Sainsbury’s has so far been unable to give any detailed clarification of this diagnosis, or how such damage could have caused an explosion.
However, several coffee-machine suppliers who have seen a picture of the damage, which has now been widely shown on the internet, (See - http://bbc.in/aIf9Bn ) have said that they are in no doubt that the situation was a boiler explosion, probably caused by a fault at a safety valve.
Mick Ackroyd of our own Xpress Service says this an extremely rare occurrence and though there were report some years ago in the USA of the Boiler Safety Valves failing most engineers say they have never ever come across such an incident;
While being careful to stress that the cause of Tuesday’s incident has still not been established, suppliers of espresso machines have been unanimous in saying that the accident illustrates the importance of caterers treating espresso machines with care, and the importance of appreciating that such a machine is a ‘pressure vessel’, with a legal requirement of regular examination and certification by a qualified inspector on a yearly basis.
Any Commercial Establishment with a commercial coffee machine should either call us or go onto www.AIEE.org.uk. Alternatively call your Insurance company that can advise you of their requirements to validate your insurance.