Marjorie suggests a few websites:

Animations
Contains animations illustrating how bells are rung. This really helps to understand the mechanics of a bell rung full circle.

The Ringing World
This takes you to the current copy of "the comic", the weekly newsletter of the exercise. It is an interesting window on the life of the community.

Bell Board
This open site enables ringers to upload their own performances, with some minimal editorial preface on the home page. It has a search feature which enables you to see what your friends have been up to. Rarely these days I feature: I did yesterday - search for Marjorie Winter.

Exeter
This has a history of the Exeter bells.

The Sound of Bells
This is a splendid site on everything to do with the sound and tuning of bells. On it you can find references to the two famous papers by Simpson. I used it extensively when I was trying to learn about tuning a few years ago in connection with violinmaking. Just shaping the plates of a cello at the minute, so those thoughts are very much to the fore.

Dove's Guide
{Dove's Guide is the ringers' guidebook. If you are planning a ringing tour, this is your primary resource. It lists all the towers, with an interactive map, gives contact details for tower correspondents, and information about whether the bells are ringable or not. In my youth it was a bound book, updated now and again, with a more expensive version offering interleaved pages blank so that comments on the ring could be added. The online version was the pet project of a friend of mine who spent two years at the University of Maryland while I was still at school/first year at Smith. Richard Smith, of Mythic Beasts fame (see below), has taken on the project as John, the "dovemaster", is now well in his 80's and in frail health.

Central Council of Church Bellringers
The Central Council of Church Bellringers is just what it says it is. You can find most anything from here.

National 12 bell competition
National 12 bell competition. This link takes you to the page of previous winners. Clicking on any of them brings up a recording of the winning entry. This gives you a sampler of some bells, some very fine rings, and some very fine ringing. I am not sure twelve bell ringing is my favourite, but it gives a good idea of the accuracy and rhythm required. The musical aspects of ringing also are easier to appreciate on 12. With a little practice, on the recordings featuring maximus, you can hear the rhythm of two changes plus a beat, you can hear the roll-ups developing and arrive, and around the roll ups the thumping repetition of the big bells coursing in thirds. Stedman cinques is an 11 bell method, so the tenor always strikes in 12th place, marking the ends of changes, so a little easier for the novice to understand. There are two favourite coursing orders for the big bells - 9 -0 - E (nine, ten eleven),tittums, because it goes titumtitumtitum, and 9-E-O, handstroke home, because a common ending for such touches is that they come round at handstroke, slightly unexpectedly. With a small amount of practice these coursing patterns can be heard. I am listening to Exeter's winning performance in 2019 as I type.

Giants of the Exercise II
I got most of the information about the old ringers from here. It is a second book in a pair about ringers. I don't have a copy of the first book, Giants of the Exercise, but it is available from the Central Council bookshop.

As illustrations of the "fun" that different methods offer, have a look at the blue lines in the following:
Methods for Chandlers 23 spliced.

For those who find Chandlers 23 spliced humdrum and common place, try this peal, rung in hand (each person ringing two bells) a couple of weeks ago, take a look at
Spliced Surprise Major
The nickname of the peal is "Mythic Beasts" - all the methods are named after mythic beasts, except Lessness. Mythic Beasts is also the name of an isp hosting company with one of our composing experts, a local ringer, as one of the CEO's. Jonathan Agg, David Brown and David Pipe are three of our local ringers, all of them absolutely at the top of the ringing fraternity. I don't know the other personally. Observe that our correspondent Mark Davies is the composer.

I've just come back from a happy evening at the pub with some of the ringers following a quarter peal at the Catholic, a nearby tower, not a quarter of a mile away (glorious 8, 31cwt in D, Taylor's 1895). The band included Jonathan Agg, who rang in the mythic beasts peal as well as Richard Smith, another noted composer. Jonathan was kind enough to forward me this link to Mark Davies' notes on the composition:
On Mythic Beasts.
You may not understand it all---I didn't---but it gives a flavour of the challenge and appeal of composition, especially the computing challenges. I am not in that class of ringer or composer, but I feel deeply privileged to count them among my friends.

Some additional websites:

The website for Stan Wagon's article in The Ringing World video

The website for an interview with Joan Hutchinson on handbell ringing

The website for Stan Wagon's use of Mathematica} in solving methodoku puzzles and creating a change-ringing method that has been rung in England and is recognized as "official by the Central Council.

The website for a lecture on mathematics and change-ringing