Diesel Transit Alternator Overvoltage !!

As the title a friend of mine who lives in Boston Lincolnshire has a Problem with his transit diesel ,, What he has told me is that his Alternator boiled his battery dry and whilst doing So fried some components "" Oh Dear" anyBody on here good with fried ECU's and the like What has he likely damaged that it will not now start and is there anyone on here local to Boston that may be able to give him some help he is not currently on the Internet

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