Thanks for all those thoughts. It sounds like for the size of group I'm thinking about a limited company approach may provide only marginal benefits.
Second dumb question (actually this may be in several parts

)....
Thinking about the operating costs, I can think of:
1) Insurance
2) Hangarage/Parking
3) Maintenance (50hrs/Annual/Star Annual - did I miss anything/!)
4) Fuel
5) Landing fees/Usage (feel free if anyone wants to rent me a grass strip with a hangar near NW London!!)
6) Engine fund
Again, did I miss anything?
And for those of you who run groups out there - which bits do you roll into an hourly charge (engine fund/maintenance fund/fuel? (is this right - I'm still slightly at a loss why people do this) and which bits do you levy monthly (insurance/hangarage?)
And (I warned you this was a multi-part question

).....
How much do you build in for an engine fund?! Am I right in estimating that a replacement engine (Lycoming 0-320-B2B) is approximately £10,000 (Flyer - April 2003). The engine has a TBO of 2000 hours, therefore just divide that into £10,000 to get £5 per hour (I'm presuming the cash goes into an interest bearing account therefore I've not inflation adjusted). BUt presumably this doesn't take into account the cost of fitting (no idea) and if it blows up in five years' time....
Help?!