one of only seven commissioned by ministry of technology in 1967 to visit factories promoting new technologies .
owned by transport trust until 1975 then sat in essex field in for 14 years until rescued by former owner in somerset .
ollie halls and emma giffard bought it in 2005 for just £ 1,200 and spent £ 35,000 and five years on total restoration .
since then it has toured the country showing vintage footage and even starred in tv and radio programmes .
re-united with lost trailer after 23 years thanks to call ` out of the blue ' - which had been being used as a wood shop .
now on sale on ebay for £ 120,000 as parents no longer have time to run the cinema which has ` taken over our lives '