1960-61, did all my dual in a T 21, but was sent solo in a Tutor Mk II. At that time the T21 was only normally flown with two up, and only later was it modified to have a ballast block fitted in the nose, so that it could be used solo.. Having said "normally flown two up", I do recall it being flown once with one pilot and a tea urn strapped into the other seat. No doubt highly illegal.