evidence: Some of the UK's most popular branded foods have soared in price over the last two years - with a range of items now costing double, according to new research. [...] The second biggest average percentage increase on the branded products included in Which?'s list was on Dolmio Lasagne Sauce (470g) which went up by 47% or 61p across the six supermarkets in the two years. [...] But branded products are not alone in seeing price rises - the price of low-cost everyday goods increased 17% in the 12 months to September, more than the average rate of food and drink inflation.