UPDATE. My problem came when the alternator give up and it goosed the battery. After replacing these it was fine for a few days then the dash warning lights started staying on. The whole problem was traced to the steering pump leaking. The culprit was the O ring mentioned above priced at about £1.50. The job is easy enough for someone with a good set of spanners so if your pump is wet on the outside change the O ring on the reservoir. In my case it did look like the pump gaskets were shot and leaking but it was just the O ring. To change the O ring you'll be better removing the air filter and sensor then it's easy to get the res off. A 10mm socket through the pulley and a 10mm ring spanner for the other 2 bolts. I suggest you syphon out what you can first and use plenty of rags under the pump. As you pull it off be quick to put your finger on the hole at the bottom of the res to minimalise spilage. If you are just doing the O ring an hour will be all you need unless you are like me and have a brew when you get it off. To do all the above (Alt & pump) the tools you need are 10, 12, 14mm sockets and spanners, that's it.