Hi Colin and welcome to the forum
As no-one else has replied to your post - I will do so belatedly (just got back from holiday last night!)
Your shareholding will be viewed as an asset by your IP, who will want to know the value of the company in order to evaluate whether the shareholding is worth anything.
It is unlikely that the company's bank account will be effected by you entering into insolvency proceedings, but you will need to include your personal guarantee as a contingent liability if the company runs on overdraft.
You cannot really keep the business to one side, as there are things which may be effected as I mention above. Are your co-directors aware of your personal situation and the impact this may have on the company?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk