I visited the Kempton Steam Museum yesterday and was mightily impressed by this engine. One of two engines built in 1928 to pump drinking water to London. The engines are some 62 feet (18.9 m) high and weigh in at 1000 tons apiece. One engine would pump 19 million gallons (86,375,710 litres) a day to the households of London.
The engines finally stopped pumping in 1980 and sat unused for many years until the Kempton Great Engines Trust was formed in 1995 to create the museum and preserve the engines. The No.6 engine has been fully restored and runs regularly under steam. Its partner (No.7) does not run but you can get a guided tour from top to bottom (not good if you have problems with heights). The picture is taken from the top gallery of the the No.7 engine.
The engines are run once a month so check on the website for running days. Kempton Steam Museum. The museum is well worth a visit and the Metropolitan Water Board Railway Society is busily restoring the narrow guage Hanworth Loop and this can be visited on steaming days. Hampton Kempton Railway. There is plenty of onsite parking and refreshments are available on steaming days.