UK consumer confidence fell to -12 in July from -1 in June - the biggest drop in 26 years, according to a poll by market researchers GfK.
The survey of 2,000 people found increased concerns about the economic outlook has dented the confidence of UK households and manufacturers.
The report found that people were on average more pessimistic about their finances, the economy, and whether or not now was a good time to make big-ticket purchases such as household appliances and furniture.
Consumers in post-Brexit Britain are reporting higher levels of concern this month. We’ve seen a very significant drop in confidence, as is clear from the fall in each of our key measures, with the biggest decrease occurring in the outlook for the general economic situation in the next 12 months.
Many supermarket groceries are sneakily being sold in smaller quantities without a reduction in price, a consumer group has claimed.Read the full story ›
Labour leader Ed Miliband said consumer groups would be given a greater role in identifying and fixing "broken markets" if his party won the next General Election.
Mr Miliband told BBC1's Andrew Marr Show he would legislate to ensure Which? and Citizens Advice would be given a say in setting the agenda of the Competition and Markets Authority.
He claimed Labour would be "the party of the consumer" and the plan for an annual competition audit of the economy would help ensure that areas where regulators were failing would be identified and tackled.
The Labour leader said: "Unless you bring the consumer into the heart of these things, we are not going to get the change we need, we are not going to get the change we need, we are not going to shine the light on these broken markets."
He added: "The Competition and Markets Authority scrutinises competition across the board. They will be working with Which?, the CAB and others to say 'where are the areas where competition isn't working, what are your members telling you about where we need to act?'
"They will be sending a report to Parliament and it will be framing the work for the year ahead."
The Government will "tackle" the high cost of some of their helplines, as bans on expensive 084 and 087 numbers go forward, according to a consumer campaign group.
Head of campaigns for Which? Alex Neill dubbed the initial ban "a huge victory" for consumers:
"Actually, what we have heard from the Government is that they are going to tackle this. They have said it's out of order. So we would expect them to lead by example and make sure they issue guidance to public bodies not to do this."
Customers calling company helplines to complain about faulty items or incorrect orders will no longer have to pay more than the basic rate, the Government has announced.
Consumer Affairs Minister Jo Swinson has said the crackdown on expensive helpline numbers is "good news" for consumers.
Consumer Minister Jo Swinson said the Financial Conduct Authority was committed to considering whether it could introduce measures to limit costs for those calling banks, insurance companies and investment brokers, along with retailers.
She said: "For too long, some businesses have been trying to extract every extra penny from their loyal customers.
"From next year, if something goes wrong with a cooker, or commuters want a refund on their season ticket, they will now pay the same to phone a helpline as they do to call friends or family.
"We want consumers to be confident to shop with a range of traders. The new rights announced today will mean consumers are entitled to the same level of protection whether they are purchasing goods or services online, at home or in a shop."
Customers calling helplines to complain about faulty items or incorrect orders will no longer have to pay more than the basic rate, the Government has announced.
Consumer Minister Jo Swinson said the new right would end expensive premium 084 and 087 numbers for customers calling airlines, train operators and major high street and online retailers.
Many firms already offer freephone or basic rate numbers but consumers can find that some traders provide an 0800 or freephone number for pre-contract calls to attract new customers but then only offer expensive premium rate numbers when the product or service has been paid for.
The measure is to be included in the regulations implementing the Consumer Rights Directive, which is due to come into force in June 2014.
Around 10 million BT customers are being told that phone and broadband prices are to rise by up to 6.5% in another blow to households struggling with soaring utility bills.
BT is hiking its prices from January 4, but denied the move was linked to its push into sports broadcasting.
The increases follow the group cutting the price of broadband to £10 for copper and £15 for fibre, and giving away BT Sport for "free" with broadband.
- Line rental will go up by 54p, or 3.5%, a month to £15.99, and other prices such as set-up fees and price-per-minute rates will increase by around 6%.
- The main calls packages BT sells now will remain the same price but existing customers on older tariffs will see a rise of around 6%.
- The formerly free BT Answer 1571 and BT Privacy with Caller Display will cost £1.75 a month.
- Broadband prices will increase by up to 6.5%, although the current broadband offers will remain at the same price including broadband and weekend calls for £10 and Infinity and weekend calls for £15.
- Mobile calls will be unaffected.