+44 Telephone Number - Access Validation Techniques

Basic instructions on how to validate a telephone number with a +44 prefix for the BTEC Information Systems, Creating Systems to Manage Information (Unit 2) Database Exam in Microsoft Access. These videos have been created for the benefit of my students and not intended for wider use, but feel free to use if they can help. I do not claim to know everything, so if there are any mistakes or other ways to complete feel free to mention it in the comments :-)