After 4 good years with my Sovereign,now got major battery problem.Went to car,battery flat,would not charge so sent for Greenflag who jump started car,checked & said battery Knackered ( technical term),got new battery,fitted but next morning dead flat.Took to garage who look after Jag for me.They tried many things and finally diagnosed nearside front window motor,disconnected and ordered new one.After about 10 days,when car started everyday,they fitted new motor and I collected car.Next day started and ran perfectly all day no problems.Did not use yesterday,this morning battery completely flat again.I will be returning car to garage later,any suggestions as to cause of problem or things to check.Thanks Reg.