Thanks Nich. The problem is that something discharge the battery so the car won't start in the morning. The alternator has been repaired several times but nothing has been discovered. Have solved the problem fitting a switch under the bonnet to disconnect the battery but I know this is not correct solution. Leaving Estonia last week for POL alternator was disconnected and the battery is full. That's why I'm thinking to replace alternator. Shall I send a PM to Big Frank?
BTW did you visit POL and Ragley Hall last weekend?