PP are you answering two cases ?
answer - yup as ever multitasking ....
ready mix case is Ready Mix Concrete v MOPNI
and is here
http://www.hmrc.gov.uk/manuals/esmmanual/esm7030.htm
and is the leading case on - whether you are employed or are self employed with a contract for services
well this is the law thread
and in mu opinion - - you were clearly an employee ....
in whcih case you have to do as your employer says
moppett or not