Look closely at the detail in the colour-tinted photograph 'Women Protected by Wings]?' and you'll appreciate the joke. These are, indeed, flying sanitary towels (with wings) descending on their unsuspecting targets. It's an imaginative daydream for our times and proof that the most obvious ideas are the best: as a visual interpretation of the television advertisement fronted by Claire Rayner, it's exactly right and sends that particular bit of marketing nonsense sky-high.

The photograph has won Sue Evans and Tim Robinson pounds 750 in this year's South Bank Photo Competition which invited interpretations of the theme 'Make Believe'. It can be seen along with other prize-winning photographs (including Mohini Chandra's 'Travels in a New World 2' which won the top prize of pounds 2,000) and selected entries at the Royal Festival Hall Galleries, until 20 July.

Photography student Mohini Chandra has created a montage of images to reflect family, religion and colonialism in an attempt to explore the migration of her own family from India to Fiji, then Britain and Australia. Other inspired subjects include cross-dressing, football, royalty and lonely hearts.

The competition, now in its seventh year, regularly attracts around 3,000 entries from London-based amateur and professional photographers. Eleven cash prizes, ranging from pounds 2,000 to pounds 500, are awarded but even if the photograph doesn't win a prize, it still has a good chance of being included in the exhibition - valuable exposure for any photographer. Oscar Stevenson's series of four images, 'Breakdown', was touted to several newspapers for publication, and while no-one actually used the pounds 750 prize-winning series, the Daily Mail liked his style and have signed him up for future work. Others just get better at winning awards: last year's pounds 2,000 prize-winner, Suky Best, now in her second year of an MA in Photography at the Royal College of Art, was joint-winner of the National Portrait Gallery / Independent on Sunday John Kobal Portrait Award this year.

South Bank Photo Show 1994, Royal Festival Hall Galleries, South Bank, SE1 (071-921 0600) to 20 July

(Photograph omitted)