Bargain Hunter: Heritage Open Days is your chance to take a free look behind closed doors

An open day next month offers free entry to more than 4,500 places across England that are usually closed to the public or charge for admission. Heritage Open Days celebrates England's architecture and culture by offering free access to castles, city halls, tunnels, police cells, private homes, and many more.

This year it's being held over the four days from Thursday 12 to Sunday 15 September and includes around 600 National Trust properties – such as the 18th-century Octogen at A La Ronde in Exmouth, Devon, pictured right – which is opening for free on the Saturday. The event has been held for 19 years and new attractions include Brightwalton Ecohouse in Berkshire, Birmingham Botanical Gardens and Chatley Heath Semaphore Tower in Surrey. Guided tours will be included free at many locations but the most popular ones will need to be pre-booked through the event's website at www.heritageopendays.org.uk

Be snappy and you can get a £3 Subway meal deal for free

If you love Subways you can get a free £3 meal deal by signing up to TopCashback.co.uk. But move quickly as the deal only runs until next Wednesday. To get the offer buy a Subway £3 meal deal from a participating branch and keep the receipt. Then sign up to TopCashback.co.uk and upload a picture of the receipt at the "Free Subway Meal Deal" cashback page.

Two for the price of one entry at many London attractions

Train companies running services into London have a range of two-for-one entry offers at more than 150 London attractions – theatres, restaurants, galleries, museums, tours and events, including London Zoo, City Cruises, London Dungeon and St Paul's Cathedral. Go to daysoutguide.co.uk

Half a million more £21 budget hotel rooms this autumn

Budget hotel chain Travelodge has released 500,000 rooms at £21 for the autumn and winter season, including October half-term and the Christmas holidays. To book a £21 room go to www.travelodge.co.uk

Have news of any great deals? Please send details and deadlines to yourmoney@independent.co.uk