Hey Brecht, thanks for your response.
Yes the plugin was updated prior to me adding the recipes that have been effected. The new version of the plugin is 9.4.3.
The ingredients, instruction& pictures are also missing in the dashboard, in the recipe management area.
Following the update to the plugin, all of the autoincrement settings in the database disappeared. So I went in and added them back in.
I then created the new recipes, and created a page to display them. I check the page and the recipes had appeared as expected.
The data seems to have disappeared overnight last night.
Thanks for your help,
Jack