Alex Partridge tweeted to say he was "delighted" to hear leads were being followed up on the missing medals but pleaded with the public to get in touch if they knew anything.
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Both the pilot and the passenger died in the collision shortly before 5pm near Shaw Lane, Shifnal near Telford.
Councils have been warned not to use instruction leaflets after accusations that they appear to promote the 'In' campaign.
The rumour led to praise from many fans - while some said they would be boycotting the film.