Diamond-type / double-arm panto / Metrovick

E, Tait, Swing Door, Parcels were introduced with diamond-type GE pantos.
L, Harris & Refurbished Harris were introduced with diamond-type Metrovick pantos.
The suburban electric Hitachi were later refitted with diamond-types.

V-type / Z-type / single-arm panto / Faiveley / Ausbreck

Hitachi were introduced with 'Z'-type Faiveley pantos.
4D, Comeng, Siemens, X'Trapolis, HCMT were introduced with 'Z'-type Ausbreck pantos.
Some suburban electric Harris were trialed with 'Z'-type Stone-Faiveley pantos in the late 1960's.