Yes, Shanklin was on the foot passenger service.
I have travelled on St Clare a number of times and don't like the look of her myself, she is an ugly duckling with those great slab sides!
A model could be a problem as she is quite shallow draught and those high sides will be prone to stability and windage problems. On more than one occasion the actual ship has been forced to stay out in the Solent until the wind dropped sufficiently to dock safely.
St Clare is also propelled by Voith Schneider units and not conventional propellers.
Only one of the funnels is operational, the other is an air conditioning vent and there is nothing below it in the wheelhouse, see pic below.
Colin