SIM card for West Africa (calling UK)
 

Can anyone recommend a good sim card for calls from Morocco, Mauritania & Senegal to the UK ?

Just buy one from the side of the road with some credit (texting in country is not expensive) and then get someone to call you from the UK using those cheap phonecalls numbers or even Skype. That worked for us on the West Coast trip. Otherwise they're all much of a muchness when you're on the ground out there.