Robert Wooster wrote:

the plant is in full view of our sitting room window, so I will have to
think hard about protection for it(suppose I could draw a smiley badge face
on the cage Lol)

Yes, it's a problem a lot of folks who grow exotics have to face. I
don't have to worry about it down here since winters are mild enough
for several Musa species to come through without any form of protection
and in some years they remain virtually evergreen. I understand that
over in Norfolk, Will Giles builds a big enclosure of straw bales to
protect his clump of basjoo and then covers it in a tarpaulin. I'm not
sure I would be prepared to go to that extent.

we have several suckers coming off this plant and will follow your
instructions on propagating
I wondered if removing three and leaving the largest sucker would be best
for the plant?

To an extent it is down to personal choice. To my mind a a single
shoot is less attractive and impressive than a large clump. However,
it's also worth considering that with more shoots on the plant, there
are more leaves. More leaves = more plant foods manufactured = more
starches stored within the rhizomes and roots. In turn this leads to a
more vigorous plant better equipped to cope with prolonged cold periods
and more likely to resume growth with the onset of warm weather.

A lot of plants on the borderline of hardiness need large reserves to
help them through our long winters and provide the energy to resume
strong, sustainable growth in spring. This is why so many appear to
survive winter, only to collapse as they struggle to get started.
Reserves are depleted, resulting in severely weakened plants that are
prone to opportunistic bacterial and/or fungal attacks.