Thanks all for your comments, particularly for Lodge for suggestion of Access Database rather than Excel. I will have a look and see if I can get on with it.
Fields I have gone with are -
Monarch Self-explanatory
Ruled Date they Ruled, which dictates the order of the entry in the file
Coin Type Penny, cut-half, groat etc
Date Specific date of the coin or date range
Reference Dia, weight & thickness plus reference used (Spink / North etc)
Description Lifted from the PAS description
PAS Reference URL link to PAS page
Picture Lifted from PAS
Value My best estimate of value, particularly for cut quarters /halves etc.
Fine Value The 'fine' value as in Spink
You will notice the Value/ Fine Value at the bottom of the fields, this is not because I am a seller of finds, I like to collect and have never sold any of my finds. The reason I am doing this is, if I keeled over tomorrow, my family would then have an idea of the value of my collection, if they decided to sell it and would know if a dealer was being honest in evaluating it. Morbid maybe, but you do hear stories of boxes of coins being picked up for very little at car boot sales because partners of detectorists being completely in the dark about the value of collections.