Hi Chris,
Mike Pendlebury posted the exact colours on here sometime ago and they are as follows;
BS 381c then add as appropriate
Oxford Blue 105
Orange 557
Bold yellow 363
Red Rail 539
Also you could try Humrol enamels midnight blue 15 orange 18.
Hope this helps? As to a primer you’re on your own on that one i’m afraid!!
Happy New Year,
Ed