The UK pilot site comprises four diverse buildings, namely:
(1) The Marriott County Hall, a hotel located in Central London. The building was originally constructed in 1939 and an additional wing was added in 1974. It comprises 186 rooms, 14 suites, 12 meeting rooms and 1 concierge level. The building has 6 stories. It relies purely on electricity for energy and it consumers about 1300 MWh annually.
(2) A retail store building located in central London. The building was erected in the 1960s. It has 5 stories and consumes about 850 MWh of electricity annually.
(3) A retail store building located in central London. It was originally built in 1920 and completely refurbished in 2014. The building has 7 stories and consumes about 900 MWh of electricity annually.
(4) A 5-story apartment building in central London. The floors above ground house 4 flats of about 70sq.m. each. The building was constructed in 1920 and refurbished in 1990. It uses an energy mix of electricity and gas and its average annual consumption per flat is about 4MWh for electricity and 16MWh for natural gas.