Hi Trevor,
There is a book called Royal Navy Trawlers by Gerald Toghill, or could be a series.
Part One deals with Admiralty Trawlers, ISBN 0-90777195-5
Published by Maritime Books, Liskeard, Cornwall. Tel 01579 343663
web site: www.navybooks.com
Owner Mike Critchley may be able to help in tracking down if there is another volume.
The dust jacket of the book states:
"In the early days of the 20th Century the simple contact mine was becoming the cheap weapon of choice for many navies. Countering this threar eventually fell to the humble trawler - the similarity
between trawling for fish and trawling for mines having been quickly realised. By 1916 however, the Admiralty were facing a famine of commercially available trawlers - so they went into the trawler building business. By the time the Armistice was signed, the RNR Trawler Section, originally a little force of 1200 men and 150 vessels for sweeping UK waters, had expanded to a massive 39,000 men, manning more than 700 vessles at home and abroad. This volume traces the histories of those Admiralty built vessels which started life a humble minesweepers but soon became the jack of all trades in two World Wars and beyond."
Hope that helps.
Regards
Chris
PS Just found Volume 2 on the bookshelf behind me. This details with requisitioned trawlers.
If you find out what ships he was on, pm me and I'll track down the vessels for you from the books.
edited by ChrisD due to not keeping a proper record of books owned