Embassy. Josephine Gauld was appointed British High Commissioner to Sierra Leone in September 2024, in succession to Lisa Chesney. Trade. In 2024, Sierra Leone was the UK's 148th largest trading partner accounting for less than 0.1% of total UK trade. Total trade in goods and services (exports plus imports) between the two countries was £99 million, an increase of 22.2% or £18 million from 2023.