With much of the site under construction or stripped down, the visit involves a bird's-eye view from the ArcelorMittal Orbit tower which stands next to the Olympic Stadium.

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He said many people in the town will still remember her visit to Merseyside in 1989, which coincided with the closure of the Bird's Eye factory with the loss of 1, 000 jobs.

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To become a bird ringer in your area visit the BTO website to find out where your nearest ringing trainer.

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Although bird enthusiasts from both countries visit during the summer months, Canada has a more noticeable presence on the island.

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