How do I remove top or access the inside of my Hotpoint washing machine?

The drum refuses to turn on my Hotpoint washing machine. On previous models this has been due to: worn brushes, burnt out motor or dislodged drive belt. However on this model WF860P (unlike previous ones) I cannot work out how to take off the top of the machine to gain access to the inside to diagnose &/or repair the fault. How do I remove the top or gain access inside the machine, is there some special tool required for this on this model?