|
# | Tower | Bell | Weight | Note | Diameter | Cast | Founder |
| 21251 | Isle Brewers, Somerset, All Saints | 4 of 4 | 10½ cwt | A | 39.00″ | 1894 | Llewellins & James |
| 21252 | Isle of Dogs, Greater London, Christ Church | 1 of 8 | 3–3–2 | F♯ | 26.00″ | 1907 | Mears & Stainbank |
| 21253 | Isle of Dogs, Greater London, Christ Church | 2 of 8 | 4–0–2 | E♯ | 27.00″ | 1907 | Mears & Stainbank |
| 21254 | Isle of Dogs, Greater London, Christ Church | 3 of 8 | 4–2–7 | D♯ | 29.00″ | 1907 | Mears & Stainbank |
| 21255 | Isle of Dogs, Greater London, Christ Church | 4 of 8 | 4–3–3 | C♯ | 30.00″ | 1854 | Charles & George Mears |
| 21256 | Isle of Dogs, Greater London, Christ Church | 5 of 8 | 5–3–9 | B | 33.00″ | 1854 | Charles & George Mears |
| 21257 | Isle of Dogs, Greater London, Christ Church | 6 of 8 | 6–2–23 | A♯ | 35.00″ | 1854 | Charles & George Mears |
| 21258 | Isle of Dogs, Greater London, Christ Church | 7 of 8 | 8–1–8 | G♯ | 37.00″ | 1854 | Charles & George Mears |
| 21259 | Isle of Dogs, Greater London, Christ Church | 8 of 8 | 10–3–27 | F♯ | 42.00″ | 1854 | Charles & George Mears |
| 21260 | Isleham, Cambridgeshire, S Andrew | 1 of 6 | 6–1–2 | C | 31.00″ | 1967 | John Taylor & Co |
| 21261 | Isleham, Cambridgeshire, S Andrew | 2 of 6 | 9–1–0 | B | 35.00″ | 1516† | (unidentified) |
| 21262 | Isleham, Cambridgeshire, S Andrew | 3 of 6 | 8–3–25 | A | 36.38″ | 1516† | (unidentified) |
| 21263 | Isleham, Cambridgeshire, S Andrew | 4 of 6 | 10–3–7 | G | 39.69″ | c1485† | Bury St Edmunds foundry |
| 21264 | Isleham, Cambridgeshire, S Andrew | 5 of 6 | 14–1–2 | F♯ | 43.50″ | 1819 | William Dobson |
| 21265 | Isleham, Cambridgeshire, S Andrew | 6 of 6 | 18–2–1 | E | 48.00″ | 1680 | John Darbie |
| 21266 | Isleworth, Greater London, All Saints | 1 of 10 | 4–0–18 | G | 25.88″ | 1931 | Mears & Stainbank |
| 21267 | Isleworth, Greater London, All Saints | 2 of 10 | 4–3–9 | F | 27.50″ | 1931 | Mears & Stainbank |
| 21268 | Isleworth, Greater London, All Saints | 3 of 10 | 5–0–26 | E♭ | 29.13″ | 1767 | Lester & Pack |
| 21269 | Isleworth, Greater London, All Saints | 4 of 10 | 5–0–26 | D | 30.00″ | 1767 | Lester & Pack |
| 21270 | Isleworth, Greater London, All Saints | 5 of 10 | 5–2–4 | C | 31.88″ | 1767 | Lester & Pack |
| 21271 | Isleworth, Greater London, All Saints | 6 of 10 | 6–2–9 | B♭ | 33.81″ | 1767 | Lester & Pack |
| 21272 | Isleworth, Greater London, All Saints | 7 of 10 | 7–1–25 | A♭ | 36.75″ | 1767 | Lester & Pack |
| 21273 | Isleworth, Greater London, All Saints | 8 of 10 | 8–3–11 | G | 38.63″ | 1767 | Lester & Pack |
| 21274 | Isleworth, Greater London, All Saints | 9 of 10 | 12–0–7 | F | 43.00″ | 1767 | Lester & Pack |
| 21275 | Isleworth, Greater London, All Saints | 10 of 10 | 16–0–24 | E♭ | 47.00″ | 1767 | Lester & Pack |
| 21276 | Islington, Greater London, S James Ap | 1 of 6 | 2–0–1 | A♯ | 20.44″ | 1989 | Whitechapel Bell Foundry |
| 21277 | Islington, Greater London, S James Ap | 2 of 6 | 2–0–11 | G♯ | 21.38″ | 1989 | Whitechapel Bell Foundry |
| 21278 | Islington, Greater London, S James Ap | 3 of 6 | 2–1–23 | F♯ | 22.81″ | 1989 | Whitechapel Bell Foundry |
| 21279 | Islington, Greater London, S James Ap | 4 of 6 | 2–3–20 | E♯ | 24.19″ | 1989 | Whitechapel Bell Foundry |
| 21280 | Islington, Greater London, S James Ap | 5 of 6 | 3–3–5 | D♯ | 26.50″ | 1989 | Whitechapel Bell Foundry |
| 21281 | Islington, Greater London, S James Ap | 6 of 6 | 5–0–15 | C♯ | 29.44″ | 1989 | Whitechapel Bell Foundry |
| 21282 | Islington, Greater London, S Mary V | 1 of 8 | 5–0–2 | E | 28.50″ | 1774 | Pack & Chapman |
| 21283 | Islington, Greater London, S Mary V | 2 of 8 | 5–2–10 | D♯ | 29.63″ | 1774 | Pack & Chapman |
| 21284 | Islington, Greater London, S Mary V | 3 of 8 | 6–1–14 | C♯ | 32.00″ | 1774 | Pack & Chapman |
| 21285 | Islington, Greater London, S Mary V | 4 of 8 | 7–1–15 | B | 33.75″ | 1774 | Pack & Chapman |
| 21286 | Islington, Greater London, S Mary V | 5 of 8 | 7–3–23 | A | 35.50″ | 1774 | Pack & Chapman |
| 21287 | Islington, Greater London, S Mary V | 6 of 8 | 9–0–22 | G♯ | 37.75″ | 1774 | Pack & Chapman |
| 21288 | Islington, Greater London, S Mary V | 7 of 8 | 11–0–15 | F♯ | 41.75″ | 1799 | Thomas I Mears |
| 21289 | Islington, Greater London, S Mary V | 8 of 8 | 16–1–21 | E | 46.75″ | 1808 | Thomas Mears & Son |
| 21290 | Islip, Northamptonshire, S Nicholas | 1 of 6 | 4–0–10 | D♯ | 27.25″ | 1678 | Henry I Bagley |
| 21291 | Islip, Northamptonshire, S Nicholas | 2 of 6 | 5–0–21 | C♯ | 29.50″ | 1892 | John Taylor & Co |
| 21292 | Islip, Northamptonshire, S Nicholas | 3 of 6 | 5–3–11 | B | 31.50″ | 1892 | John Taylor & Co |
| 21293 | Islip, Northamptonshire, S Nicholas | 4 of 6 | 6–1–6 | A♯ | 33.25″ | 1678 | Henry I Bagley |
| 21294 | Islip, Northamptonshire, S Nicholas | 5 of 6 | 8–3–1 | G♯ | 36.00″ | 1892 | John Taylor & Co |
| 21295 | Islip, Northamptonshire, S Nicholas | 6 of 6 | 12–2–9 | F♯ | 41.50″ | 1892 | John Taylor & Co |
| 21296 | Islip, Oxfordshire, S Nicholas | 1 of 8 | 2–3–21 | G | 23.81″ | 1956 | Mears & Stainbank |
| 21297 | Islip, Oxfordshire, S Nicholas | 2 of 8 | 3–1–12 | F♯ | 25.00″ | 1956 | Mears & Stainbank |
| 21298 | Islip, Oxfordshire, S Nicholas | 3 of 8 | 4–0–11 | E | 27.31″ | 1859 | George Mears |
| 21299 | Islip, Oxfordshire, S Nicholas | 4 of 8 | 4–2–17 | D | 29.06″ | 1859 | George Mears |
| 21300 | Islip, Oxfordshire, S Nicholas | 5 of 8 | 5–1–26 | C | 31.63″ | 1859 | George Mears |