Call Change theory in Bell Ringing (on Pint Glasses)

Ever wondered how the music works in Bell Ringing? Call Changes is the basic way of creating music for Church Bells, and it's all achieved by swapping pairs of bells in a sequence. Here's a demonstration and explanation for you.
Entered into the Central Council of Church Bell Ringers' video competition for August 2020. (Best demonstration of Change Ringing not on Tower Bells.)

[@utube4andydent]

Ringing maths and pint glasses what a perfect combination. In Devon and Cornwall they only ring call changes explains the empty pint glasses at the end of each evening.

[@lawrencelinehan4602]

Thank you - keep posting and being yourself.

[@WilliamPorterTech]

Wonderfully clear explanation of something that to me has not been clear at all before. Thank you so much for this!

[@toxicapple7212]

I’m new to ringing and this is an outstanding video on call changes! Thanks

[@StanleyV64]

Thank you for the visual example. I've struggled to properly understand changes, but this really helped.

[@easleydp]

Swotting-up prior to my first lesson this evening - this video was very useful, thank you!

[@virginiahouser1060]

Thank you! This is very helpful!

[@Sam76889]

This video is extremely helpful for a newbie. Thank you

[@FrancescoBellringer]

Have to say this explanation was really good and easy to follow (i mean i am an ‘experienced’ ringer but it made complete sense and thought it was a very good explanation)

[@stephenchurch9563]

Enjoyed your video, straight forward tutorial

[@SWJuergen]

Thank you for the detailed explanation.

[@kyletheringer]

Amazing mate

[@diysteve678]

Brilliant !

[@howardgalloway5606]

Most informative, many thanks.

[@angelapluess1862]

Thank you - I am struggling with this and it was helpful

[@36degrees1978]

Very helpful thank you !

[@h-di4qd]

thanks for the great video :) I'm curious why, in the original order, 1 and 4 cant be swapped. Aren't they next to each other as the pattern loops? 1, 2, 3, 4, 1... can't become 1, 2, 3, 1, 4

[@angelapluess1862]

I wondered that too

[@Steven_Rowe]

And as most ringers know, ringers love pint glasses, normally filled with real ale.

[@JamesTheBell1]

Indeed, but one shouldn't drink and describe.

[@Steven_Rowe]

@@JamesTheBell1 I actually know a ringer who has rang over 4000 peals who went for a peak at the Imperial Institute in London, he had a few pints before the peal and rather than loose the peal simply peed himself and carried on for another two hours.
What a silly boy

[@ΝΙΚΟΣΠΟΔΑΣ-δ4σ]

@@JamesTheBell1 nice

[@peterclark1041]

I was No 3 bell and the Captain called 3 follow 4 …..I did that ok and then he calls 4 follow 3 ….and I don’t know who I then follow….so I screw up the whole change series by being too slow to think I should follow 2 again? Felt so guilty I went off to pub and got drunk.

[@JamesTheBell1]

Oh please don't feel guilty. Knowing who to follow can be hard at times. That's why I made this video. :)

[@richardpaxford5792]

Please ring a QP on these and claim it as the first rung on pint-sized bells! =D