Anthony R. Gold wrote:
I often have problems with a Numatic Henry vacuum cleaner when wet or
damp debris weaken and perforate the paper filter bags.

Damage to the filter is the least of your worries. A 'dry' vac like Henry
has a direct cooled motor, so any moist air is blown over the (live) motor
windings. Worst case scenario - large bang. Best case scenario - badly
corroded motor.

I see some
cleaners described as Wet or Dry, but from the descriptions they
appear to be dual purpose to work with paper filter bags to pick up
dry solids or work with a float switch to pick up liquids.

Exactly, but they also have a by pass cooled motor - moist air is directed
away from the motor, which has a sepatate cooling fan.

I can not
see whether there is any filtering in that wet mode.

None, but in wet/damp conditions there isn't any dust, so no filter is
needed.

Can someone
advise on a suitable cleaner for collecting wet and damp solids such
as garden debris of leaves and twigs.

A garden blower vac like this
http://www.screwfix.com/app/sfd/cat/...61017&id=93014

A normal vac is completely the wrong tool for the job.


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257