Charities in the UK might be able to help by providing you with basic essential items or food if there are delays with accessing financial support. You can search for your local foodbank via this https://www.trusselltrust.org/get-help/find-a-foodbank/. You can search for other charities offering financial support via this https://www.turn2us.org.uk/ and also search online for Ukrainian charities in the UK such as the Association of Ukrainians of Great Britain https://www.augb.co.uk/.