If you do get those, jo. A little tip for you, most of the lads ( including myself ) pull the Yellow plugs off the string and put them in our ears as the string tends to irritate ( makes your neck itch ) our necks.
Mind you if you intend sleeping with them in your ears if you remove them from the string you'll be probably be having to search the bed in the mornings looking for them.
Thank you again, tonyav. I really don't want to try sleeping in the bath again, so will hope the things stay in my ears for long enough for me to get a bit of sleep.