According to the Independent Commission for Aid Impact (ICAI) - a body that scrutinises aid spending - it has increased from 4% of the aid budget in 2020 to 28% in 2023.
Downing Street says it is carrying out a "line by line" review of aid spending, meaning - in theory - any part of the budget could be cut.
This may not sound like aid funding in the traditional sense, but the costs of supporting refugees during their first year in the UK does count towards the official figure for development assistance.
The government has also announced the halting of aid to Rwanda due to the government in Kigali supporting a rebel group that has captured parts of the Democratic Republic of Congo.
One seemingly "unprotected" area is bilateral aid spending on countries that are not facing the most acute levels of war, conflict and humanitarian crisis.
