This is an excellent example of the Wrenn W2235 Rebuilt West Country Locomotive in BR Green, running number 34005. Both bogies and tenders have metal rimmed wheels an approach which Wrenn Basildon adopted during the 1969 - 1970 era and afterwards. Also most examples from this era are "play worn" this is not, and comes from the 1975/6 production build in my opinion. 

Comes complete with original P3 box,  packing rings, tissue, Hornby Dublo coupling conversion kit and Instruction Manual. The bottom of the white inner box has the usual sellotape residue marks denoting  Basildon P3 issue. 

Condition in my opinion is "excellent to near mint" for its age