The borough's famous peregrine falcons have returned.

There were fears Perry and Gwen had found a new home as there had been no sightings of the magnificent birds since January.

A group of dedicated volunteers, lead by Rob Dolton, had given up hope after experts inspected the site on top of Quadrant House and saw no sign of activity.

However, a facebook site broke the news yesterday that the pair had returned.

A post on the site read: "If there's one thing that the Sutton peregrines do well at, it is the element of surprise. This afternoon Sue, one of the eager volunteers called and was ecstatic to announce that she had witnessed what the London Peregrine Partnership later seemed to confirm that Perry was making the scrape (nest) on top of Quadrant House."

Volunteers are at a loss to explain why the protected birds have arrived so late in the day as eggs across the UK have hatched.

The post read: "It may be that it is a new falcon and Perry has wooed her to the site and their breeding hormones are still going crazy.....It would be very unlikely we would have eggs so late, but this pair always seem to surprise us so watch this space."

The tiercal is the male peregrine, with the name coming from the latin 'third' because it is a third smaller than the female falcon.

Security at Quadrant House, next to Sutton train station, has been alerted and have agreed to not go onto the roof while the volunteers monitor the situation via a specially assembled webcam.

The birds and the nesting site are protected so anyone caught attempting to get on the building's roof will face criminal fines of up to £5,000. Have you seen them? Contact jpepper@london.newsquest.co.uk