vaali - we did provide proof of communication when we sent in our application but we only had a few months of proof before we sent it in. by written explanation they wanted us to explain what status he held in UK, the visa, and when he had arrived and departed from there.
do approach your MP for a status update and visit the embassy before your medical expires. we visited the embassy few times before our medical expiry to find the status of our application.
another piece of advice, the embassy will most likely request an updated police clearance if it has been one year since you have sent in your application. we were requested to submit a police clearance for the year our application was in process. it is best to be aware of this so you are able to provide the clearance as soon as possible if they request it.