I submitted a short story to a website whose published stories appeal to me. They very kindly answered and while they did not decide to publish this story, they offered some very useful and supportive advice.
They attached a document which was first published in the Guardian & the Guardian online on the skill of “show, don’t tell”. The article is also available as a Kindle book and can be found under : http://www.guardian.co.uk/books/2011/oct/23/how-to-write-fiction-mj-hyland.
As this was helpful, I searched for some more detailed information on this writing skill and quickly found a book (also available on Kindle) which give some very concrete examples of how to show rather than tell. This book is called “Show and Tell in a Nutshell” and is by Jessica Bell.
I hope that these tips help other writers who may fall into the trap of too much “telling”.