protests have been held in several towns and cities around the uk, to highlight the impact of the cost of living crisis on workers and their families. the austerity campaign group, the people's assembly, co—ordinated the demonstrations, supported by trades unions. inflation, the measure of how quickly prices are rising, is at a 30—year high, amid steep increases in the cost of fuel, heating and food. yet official inflation figures look at a wide range of goods, notjust food, so can often mask some steep rises seen at the supermarket tills, especially on everyday items. new data for the bbc suggests that a basket of mid—range groceries has gone up in price by 8% in just one year. our business correspondent emma simpson reports. charlotte jessops, a money—saving blogger. she hosts a monthly zoom session, passing on tips. thank you for coming. we're going to be talking about the rising costs of food.