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There's growing pressure on the Queen to pay a visit to one of her most patriotic territories. Over 7,000 citizens of Gibraltar have signed a petition calling on her majesty to come to the territory, after an absence of over 60 years.

The sovereignty of Gibraltar continues to be disputed by Spain, with tensions mounting last year after a series of incursions into Gibraltarian waters. Adding to this tension is the prospect of Britain leaving the EU after the next election.

It's an "existential issue" for Gibraltar, according to the chief minister Fabian Picardo.

Our guest editor Elizabeth Butler-Sloss spoke to him when she went to Gibraltar for this programme.