The Wrenn W2238 Clan Line was produced by the Wrenn Basildon Factory betwen 1977 and 1979 (paper shield version), Period 3, and a further 816 from 1980 - 1992 (Period 4).

The later Clan Lines (circa 1987 on) were produced with etched plate shields as shown in the pictures.

This is one of those with a UNIQUE variation.

THE RUNNING NUMBER ON ONE CAB SIDE IS CORRECT "35028", BUT ON THE OTHER SIDE IT IS "34092" WHICH IS THE "CITY OF WELLS" RUNNING NUMBER.

I have checked the Locomotive closely, the number has not been changed. The front Boiler cover also shows 35028 the correct running number for "Clan Line". The Locomotive and Tender has the later bright orange lining. 

IN MY OPINION A "UNIQUE" LOCOMOTIVE, A BASILDON FACTORY ERROR, WHICH I HAVE NEVER SEEN BEFORE AS A COLLECTOR OF MANY YEARS.