This page gives details of each Brush Type 4 which may be regarded as "preserved"". The definition of the word "preserved" has become much misunderstood in recent years, but for the purposes of this page I define it thus:

A locomotive being owned, whether operational or not, and kept at a private site; for heritage or historical purposes, and not for hire or scrap.

There are a number of locomotives listed opposite which do not fall strictly within the scope of this definition, and are included solely for compatibility with other reference sources; these are identified by:

¹ owned by a train operating company, but stored at, or loaned to, a heritage location.
² privately owned but hired to a train operating company.
⁴ preserved at one time, but sold for commercial use.