TfL are quite generous with this type of information, according to the Colour Standard on the website red is:Now there's a can of worms! Anyone got any ideas as to what constitutes TfL red? You'll be marked down if you just quote Pantone 485 C and Royal Mail.
Corporate Red
Pantone, PMS 485
CMYK, C0 M95 Y100 K0
RGB, R220 G36 B31
Nattional Colour System, NCS S 1085-Y80R (this would be the code used for paint)