Thanks both for your replies!!

iliastolos - You are correct This pain has started since the start of physio (I was out of cast a week before the physio started and had no real problems) and it seems to be worse whilst and after doing the exercises it feels as though daggers are being pushed in my ankle!! The rest of the time it is throbbing or feels like little electric shocks through my foot.
The swelling looks worse after the exercises and is mainly on the top of my foot and looks as bad as when the cast was removed (3 weeks ago)
My foot either is hot and red in places or a blochy purple which feels cold to the touch, I also have a slight rash appearing around one of the scars.
The pain at night is bearable and has only woken me up once so far and this was the night I didnt take any Tramadol before bed.

I see the physio again tomorrow and will see what they think based on what you have said? I dont hold out much hope after my first visit as I was told to keep pushing through the pain and it hurts more now so we will see.

Many Thanks Again

Liz