[Tomvart]

Thanks Hugh,

I did try TNA ADM series last night, I managed to find several potential sources in the Convoy Commodores 'after action' reports - but as you point out none are available for ordering/copying due to the reading room being locked down - Frustrating to say the least after spending several hours searching!

Many thanks for those links, I will make a start there and see what I can find!

Thanks again - appreciate the help.

Tom