Battery Light

Ok so driving out to Morrisons this evening no problems on the way there but when I came to leave started up the tf ok but battery light stayed on.



So drove home quickly turned off on the drive re-started to put in the garage and out it went so rules out the belt which is newly changed so could this be the alternator itself or am I barking up the wrong tree will do a drop test on the battery in the morn but any ideas would be welcome

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