After Fixed Crash (brick Lane)

The vehicle reg. plates varied over time in layout and meanings, so different layouts mean different eras.

so at the moment its (X for a letter, 9 for a number)
xx99 xxx

before that it was
x999 xxx

before that:
xxx 999x

which suggests this reg plate was pretty old, as it fits that last pattern. I recall when T was the last letter, (denoting the year) it was way back in 1979/1980.

Yeah but you can put any plate on a vehicle provided its not newer than the vehicle. So you can't put '86 plates on a vehicle made in '82 but you can put '82 plates on a vehicle made in '86 and so on.