Loddon

I have used these https://batterystore.co.uk/leoch-sfl-130dt-leisure-battery/ Lasted 4 years Then changed for these https://batterystore.co.uk/leoch-lagm-130-leisure-battery/ Last October Battery Store is in Market Harborough so not far from you and will do discounts if you collect 3 or 4 batteries

Should fit the Nene paddle gear as well.

Electric blankets like hairdryers can use a Diode for the half power setting. Inverters don't like this generally make a loud buzzing sound and go pop.

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After many years of boating we have come to rely on three types of windlasses. For use on the canals its a Dunton Double Anglian waterways its a Walsh Alloy one as they have untapered holes and fit the paddles better than a Dunton. and The ubiquitous Middle Level socketed windlass for the gear that requires it. We have both long throw and short throw of the Dunton and the Walsh Different windlass for different paddle gear. A total of about 8 windlass not including the steel ones in the front locker

Possible craning spot. Access is a bit challenging having looked on streetview Solid bank https://maps.app.goo.gl/R84y5jy6DS5Hgg7K8 I think there is a slipway here https://maps.app.goo.gl/jqNwY32fkuRTE9s4A

Way back in the mists of time when I moved onto Idleness i don't remember having any of those problems. But then I wasn't a newbie boater.

In which case I wouldn't worry, your batteries with no load should last until you get there and much longer.

Use deionised water to mix with the antifreeze, tap water contains to many minerals. Deionised water is notvexpensive. https://www.ebay.co.uk/itm/152632387563? Less than £16 for 25Litres