Rarely seen during the day, they have learned to avoid being taken down by rifles or suckered into traps.

NPR: $1M Pilot Project Aims To Take Out Feral Pigs

Mrs Prior, who said the couple had taken "every precaution" to avoid being robbed, is determined the experience will not deter them from future travels.

BBC: Philip and Ann Prior

About 110 photographs, all taken by Scott, are being shown 10 at a time and changed fortnightly to avoid light damage.

BBC: Captain Scott Antarctic photos shown in Cambridge