When Can I Return to my Job As Flight Attendant (Longhaul) After Breast Reduction?

I am off work and live in the UK. I attempted to go back to work after 5-6 weeks after a successful breast reducion (34G to a 34 DD) but I was very sore after the flight, and in bed for days. It is now 8 weeks post operative and the scar underneath is still a little sore from the mid line to the armpit and I am still only tentatively lifting.. My job requires a lot of reaching and heavy lifting so I wondered if you had any experience with flight attendants returning back to work successfully.