Having very recently recovered from a lacerated patella tendon that I picked up in an accident in Sri Lanka and required surgery to fix it hopefully I can share some insight. After four weeks, you will may just be starting to bend the knee again, however depending on the extent of your injury you may not even be able to do this yet. However, please don't expect to be able to sit onboard with your leg in the removeable splint, it comes up very high on your thigh and therefore the only way to sit in a chair wearing it is to be right on the very edge - incredibly uncomfortable.

Please do note the points about checking with your insurer before you leave for coverage. If I was in your position, I would seriously consider consider cancelling your trip and saving for a trip you will be able to enjoy when recovered. Having spent weeks 2 to 6 in the UK recovering from the same surgery you are having, getting around anywhere is difficult and time consuming. You will also be missing appointments with your consultant and physio in the UK which will be important for your recovery.