The supermarket temporarily limits purchases in its Just Essentials range, blaming soaring demand.
Campaigner and writer Jack Monroe meets food bank users at a centre in Essex.
Price rises due to the Ukraine war will hit low income families hardest, Jack Monroe tells MPs.
The supermarket vows to stock its budget range in all stores after the food activist criticised shortages.
Boss John Allan tells the BBC costs will rise further and the plight of people on low incomes "troubles us".
Pressure grows on PM after non-binding motion on universal credit top-up is passed by 278 votes.
Food poverty campaigner and chef Jack Monroe is shocked at food parcels sent to children on free school meals in England while in lockdown.
