Up Helly Aa from Upholiday, the lowland Scots word for Twelfth Day, and was brought by them to the Shetland Islands in the 19th century. There is a main guizer who is dubbed the "Jarl". There is a committee which a person must be part of for 15 years before one can be a jarl, and only one person is elected to this committee each year. The procession culminates in the torches being thrown into a replica Viking longship or galley. The event happens all over Shetland and is currently celebrated at ten locations – Scalloway, Lerwick, Nesting and Girlsta, Uyeasound, Northmavine, Bressay,
Lerwick Power Station which depending on how it is implemented may make such a station redundant, or only required as standby, which would affect the type of plant chosen. There is an adjacent but district heating network see Lerwick District Heating and Energy Recovery Plant. However for a variety of reasons the rejected heat has never been used as a heat source for the network. This is unlikely to happen with the existing power station as it will be closed soon. Lerwick Power Station The main power supply for Shetland is provided by Lerwick Power Station, located in Gremista, northwest of Lerwick town