When it drained harder it would have taken more silt down with it, the stuff they dredged from the lower bure was probably from the thurne/hickling in the first place, as soon as flowing water slows anything being carried drops out, hence the insides of bends are usually much shallower.
Of course then the salt surges from higher sea levels would likely go further upstream.
I gained a stone within a few months of giving up smoking, then had a bad stomach bug and lost half of it in a couple of weeks and stayed there for years, now getting porky at 11.5 stone, that'll be the beer mostly.
Still buying 30" waist though, don't want to be a fatty like Griff...
Mine also came from Jackson leisure due to the same reason, price.
Anything with danfoss compressor should be good for 12v, don't even think about a 3 way for 12v as they are battery killers.
If the batteries are in a good state of charge there is no need whatsoever to run the engine while the heating starts and no-one wants to hear it when you get back from the pub at 12.00am, unfortunately lots of hire boats spend the last night close to the yard and they are not back in the yard long enough for a proper charge, next hirer picks up and heads for the closest spot and the batteries will be low which in turn takes it's toll on battery lifespan.
A good long run on the first day will help give you a good head start on battery capacity.