Pie Man,
The date of the photos will be a week earlier than you have estimated, making it on 22 or 23 Jun 05.
While Daf is correct about 2/3 Jul being the date of the 2005 Waddo Air Show, they normally start putting the marquees up a good week ahead of the event. With so little in the way of tentage etc erected when the photo was taken there would not be sufficient time to get the rest up before the ac arrived to populate the static, and the photo sessions etc began. In 2005 the Lincolnshire Show was 22/23 Jun and the shadows suggest a time around the middle of the day.
HLV