Wrenn, Basildon issued 3 Private Owner R1 0-6-0 Tank Locomotives during the years 1972 to 1985.

These were;

W2201 "Esso" in blue, running number 38 (issued in 1980 only) 

W2202 "NTG" in yellow, running number 56(issued between 1972 and 1985)

W2203 "Shell" in silver, no running number (issued between 1972 and 1983)

Production reached 336 (W2201), 594 (W2202) and in excess of 1300 for W2203. 

Some variations have been claimed over the years, particularly W2201/2, however in my opinion none existed. This is also commented on in Maurice Gunters book "The History of Wrenn". Several partly finished bodies did  come onto the market between 1993 - 2001, many being sold from the Dapol, Llangollen shop during this time.

Please always check the Locomotive finish, and box, as most were issued in Period 3 with the familiar sellotape residue marks matching top and  inner boxes.