I don't understand.

Mitre Flower (Mitraria coccinea), probably, and maybe "cramped", but what is a "drew"?

What do you mean by a lot? In your garden or in an allotment? (though its not the sort of thing you would grow in an allotment...) What is cramping it - it needs to be in a sheltered position

Thanks for all comments regarding my Mitraria Coccinea plant.

I have this in a patio tub but I feel that it may be struggling for space....it is now two years since I planted it.

Plenty of growth but crowded...how tall should this grow

Any tips on best feed to give this plant.

Thanks

Around 2m wide and 2 wide.
Found this link for you:
http://www.thegardenhelper.com/mitraria.html