Does your heater matrix look like this bottom photo ?

Smiths Circular type heater old style 5 row matrix or core for DB2 to early DB MkIII, (late MkIII's have square flat type) very efficient design with long lasting copper core not 'tinned' steel, easy to fit. Part of heater type / number 55263.

Specially made for us to our specification, not the rubbish that all other specialists sell that will not fit without modification to the 2 heater pipe holes, we have tried those !

A replacement for Smiths CH.S270/E.