Found in ASDA in Leigh, near Wigan. Priced online and instore at £18 but scanned at £4.50.
Please note there were two designs of caravan available in this store.
One was £15 with one figure and no furniture and the other was £18 two figures and furniture and a satellite dish on the caravan. It is this one that scans at £4.50. It is also on the website at £18.