Brian Hyland performs outside Downing Street for NHS campaign

Brian Hyland performs outside Downing Street with campaigner Ashleigh Harley to raise awareness of the number of young people struggling to get a diagnosis on the NHS (Stefan Rousseau/PA) - (PA Wire)

Brian Hyland has performed outside Downing Street to raise awareness for an NHS campaign.

The American musician, 82, joined British singer and campaigner Ashleigh Harley on Saturday, where they performed his hit Itsy Bitsy Teenie Weenie Yellow Polka Dot Bikini.