Makem, it used to be just an internal mirror or an offside external mirror but as you can see "Construction and Use " Regs have changed. My old Land Rover (1955) has no indicators, no wing mirrors, no seat belt and lots more. I keep waiting to be pulled but no one seems interested
Geoff
<table ="LegTable" id="tgp1-tbl1" cellpadding="5"><t id="tgp1-tbl1-tbd1"><tr id="tgp1-tbl1-tbd1-tr6"><td ="LegTDplain" id="tgp1-tbl1-tbd1-tr6-tc1">6</td><td ="LegTDplain" id="tgp1-tbl1-tbd1-tr6-tc2">A wheeled motor vehicle not in items 1 to 5, which is first used on or after 1st June 1978 (or, in the case of a Ford Transit motor car, 10th July 1978)</td><td ="LegTDplain" id="tgp1-tbl1-tbd1-tr6-tc3">
(i) At least one mirror fitted externally on the offside of the vehicle; and (ii) at least one mirror fitted internally, unless a mirror so fitted would give the driver no view to the rear of the vehicle; and (iii) at least one mirror fitted externally on the nearside of the vehicle unless a mirror which gives the driver an adequate view to the rear is fitted internally</td></tr></t></table>