Thanks for the prompt reply,
I think we may be talking at cross purposes here so, as they say, a Picture paints a thousand words I enclose a flow chart of what I would like to achieve. If the current strategy is not capable of being modified to this aim, can I request a new strategy be developed to encompass the logic in my attachment.
I don't think we are a thousand miles away from achieving this. My aim is to optimize this strategy and maybe add a filter at a later date so if it could be written with this in mind it may save some work.
Thanks again, Ross