Royal Mail livery update c1990

[ChrisH-UK]

In April/May 1990 Royal Mail launched an updated livery on TPOs with two TPO vans repainted to include the new logo/corporate image of the text on a red horizontal bar across a white vertical bar with the crown in it, the rest of the year saw just a few TPOs in the updated scheme, it was 1991 before it happened in any volume. What was the score for road vehicles, did they start getting updated before the April/May launch, in the months after it or did they also have to wait until 1991? 

 

Thanks

Chris H