Thank you for the answer.
As for the currency symbol I was referring to the =sign that appears in the order cart and emails when adding an extra option, (+ Tomato = 0.8000) can I change the = for £
I have just checked the currency in admin and it is set to 2 decimal places. This only happens if you add menu options, these options are shown with 4 decimal places.
I have upload an image to show you exactly what I see.