ARE you looking for a great outdoor event this summer? If so, why not come along and enjoy the BBC Proms in the Park, sponsored by National Savings and Investments.

NS&I is celebrating its own big event - this year is the 50th anniversary of Premium Bonds.

BBC Proms in the Park takes place in Hyde Park on Saturday, September 9 and features some of the nation's top musicians and entertainers, all there to help you share in the celebrations of Last Night of the Proms.

The entertainment kicks off at 5.30pm with BBC Radio 2's Ken Bruce introducing music from pub-rock legends Chas 'n' Dave, X Factor's Chico and Madness tribute band One Step Behind.

The main event starts at 7.30pm, with Sir Terry Wogan hosting the proceedings.

Music legend Lionel Richie, top soprano Angela Gheorghiu, Italian heart-throb Vittorio Grigolo and sensational trumpeter Alison Balsom all perform with the BBC Concert Orchestra, conducted by Carl Davis.

The day's events culminate with a live link-up to the Royal Albert Hall for the Last Night of the Proms grand finale.

So bring your flags and picnics and join in the celebrations at one of Britain's best-loved outdoor music extravaganzas.

We have 20 pairs of tickets to give away.

To be in with a chance of winning, all you have to do is answer the question below.

BBC Proms in the Park, Hyde Park, London. Sponsored by National Savings and Investments. Gates open 4pm, entertainment on stage from 5.30pm. Tickets £23 (under-threes free), call 0870 899 8100, 24 hours, national rate, £2.25 transaction fee. Or call the Royal Albert Hall on 020 7589 8212, 9am to 9pm, fee £2.25, or book online at bbc.co.uk/proms.