Sightseeing pass

The Great British Heritage Pass is the most comprehensive pass for entry to 580 attractions over four to 30 days and has some of the best reductions if you intend to pack in the sights. It also allows you to skip queues at busy locations such as Hampton Court or Warwick Castle. See: VisitBritain Direct GBHP (www.visitbritaindirect.com/en-GB/detail.aspx?ProductCode=Tp1).

Two for the price of one

If you are travelling by train to London two-for-the-price-of-one entry vouchers are available to a variety of sights and theatre productions. www.daysoutguide.co.uk (www.daysoutguide.co.uk)

Buy theatre tickets for half-price

The ticket booth in Leicester Square, London, offers the best seats in the theatre at half the normal price. Head down to the booth itself on the day you would like to see a show and find out what's available. Alternatively, stand-by tickets are sometimes available direct from the theatres' box office on the day of performance. See: VisitBritain Direct theatre tickets (www.ticketswitch.com/tickets/slink.buy/vbritain/s.uk-london_theatre/London_Theatre.html)

At the end of the day, when you have £5 or less left of your budget, don't fret. Here are our top 5 suggestions when in London:

1. Walk down art and culture hub, Southbank, and take in the free street performances, installation art and free Friday lunchtime music at Royal Festival Hall
2. Catch a Shakespeare classic for £5 at the Shakespeare's Globe
3. Immerse yourself in world culture and art at London's many free museums and galleries
4. Watch a movie art Prince Charles Cinema, Leicester Square, for £ 1.50
5. Climb up Primrose Hill famous for its film stars and celebrities and its view of London and London Zoo