[Madcaravanner]

Hi Everyone

I need some information
I know that Freightliner ISO containerised freight started a long time ago

BUT
I need to know when they started on British Railways?
Where they Only Freightliner or mixed/ limited brands ?
what was normal train length?
what type of wagon ? 4 wheel or Bogie ??
What was normal haulage?
How were the containers transferred between train and truck inland ?

I'm trying to work out if they were around when steam was still in service or if they appeared shortly after as my addled memory keeps giving me an imaged of Double header Black 5's on 4 wheel wagons with 2 20 foot boxes and a Brake Van at both ends

Looking forward to a few answers