Thank you to everyone who has offered me advice, I am always grateful.
I have cleaned the head thoroughly, visually it looks sound.
It definitely is the TR400 Model
I think I will start off by replacing those brown HUNTS caps. It does look a pain to remove the board to get to the solder side so I will likely cut the components from the accessible side... However I don't have a schematic for this so unsure of the polarity of the Hunts Caps. Is there a way to identify this visually on the cap? Apologies if this is a silly question but I am only used to doing electrolytes.
Cheers.
NM