Jenny, the Special Weapons Dalek was operated like the others, so man sat on bench seat etc. No luxury of remote control.
If I recall rightly, I think Hugh Spight operated it, but I'd need to dig out the OB recording tapes to check, as I remember the director talking to him by name.
Hugh also operated the black Dalek, so it may have been one of the others. More likely Cy Town or Tony Starr rather than John Scott Martin. So I haven't answered your question very well!
No idea on the stealth Cyberman. Not sure he'd have been credited as such. So it was possibly John Ainley, who certainly played a normally-coloured Cyberman in it, and may well have donned the black suit as well.
Thanks for the reply. Asked Hugh Spight this weekend and it wasn't him. Everyone thinks it was Cy Town who opetated special wepons Dalek. As for Stealth Cyberman possibly John Ainley but not confirmed. It wasn't Brian Orrell or Ian Marshell Fisher. Best.
"Once you start down the dark path. Forever will it control your destiny...]"