Helth Cover

Hi

I am looking for some travel insurance (I am based in the UK) to cover me doing hazardous activities, (I am planning to do the Inca Trail in Peru next year, which is trekking over 2000 m.)

I have what would be classed as an existing medical condition, as I broke my ankle and tore the ligaments in it this year, but I obviously need the ankle covered if I am trekking!!

Does anyone have any ideas?? I can find companies to cover one or the other, but not both!

Thanks in advance!