Double chime on engine start

When my one did it on the first start of the day, it would always be accompanied by the glow plug light. I could switch off, re-start and it would bong twice again. It would keep doing this until I drove it for approx 5 minutes. When I switched off and started again (no glow plug light), it wouldn't bong at all. The windscreen water low level warning light came on while I was waiting for the LR tech to arrive so I topped it up. He still found a fault on the keyless module though and it has gone in today to be have a new one fitted.