British Isles link errors

On pageLinkProblemDetected
http://www.genuki.org.uk/bigDefoes Tour http://gdz.sub.uni-goettingen.de/dms/load/toc/?PPN=PPN250678330500 Internal Server Error26 Jul 2015
http://www.genuki.org.uk/big/HistoryExcel spreadsheet http://www.genuki.org.uk/files/eng/History/Archbishops.xls404 Not Found2 Jun 2015
http://www.genuki.org.uk/big/irl/Irish Passenger Lists http://freespace.virgin.net/alan.tupman/sites/irish.htm404 Not Found1 Jul 2015
http://www.genuki.org.uk/big/MapsDigimap http://edina.ac.uk/digimap/404 Not Found1 Jul 2015
http://www.genuki.org.uk/big/MilitaryHistoryThe Mass Observation Archive http://www.massobs.org.uk/index.htm404 Not Found26 Jul 2015
http://www.genuki.org.uk/big/OccupationsUniversity of Birmingham Cadbury Research Library http://www.calmview.bham.ac.uk/Record.aspx?src=Catalog&id=XBOA500 Internal Server Error2 Jun 2015

6 problems found.