Sorry, but I don't think you read the OP's question correctly as neither
of those sites feature freight headcodes (apart from GBRf services,
which are not scrambled on the data feeds).
For the other FOCs (DB, Freightliner, Colas, DRS, etc) I recommend that
you try subscribing to Freightmaster, which is the only website to show
real freight headcodes both in its timetables
and national live maps...
(my maps also show 'real' headcodes for one off moves such as
track machines, stock moves, weekend engineering trains, etc)
MARK