diff --git a/src/core/operations/A1Z26CipherEncode.mjs b/src/core/operations/A1Z26CipherEncode.mjs
deleted file mode 100644
index fc562b9e..00000000
--- a/src/core/operations/A1Z26CipherEncode.mjs
+++ /dev/null
@@ -1,61 +0,0 @@
-/**
- * @author Jarmo van Lenthe [github.com/jarmovanlenthe]
- * @copyright Crown Copyright 2018
- * @license Apache-2.0
- */
-
-import Operation from "../Operation.mjs";
-import Utils from "../Utils.mjs";
-import {DELIM_OPTIONS} from "../lib/Delim.mjs";
-
-/**
- * A1Z26 Cipher Encode operation
- */
-class A1Z26CipherEncode extends Operation {
-
-    /**
-     * A1Z26CipherEncode constructor
-     */
-    constructor() {
-        super();
-
-        this.name = "A1Z26 Cipher Encode";
-        this.module = "Ciphers";
-        this.description = "Converts alphabet characters into their corresponding alphabet order number.<br><br>e.g. <code>a</code> becomes <code>1</code> and <code>b</code> becomes <code>2</code>.<br><br>Non-alphabet characters are dropped.";
-        this.infoURL = "";
-        this.inputType = "string";
-        this.outputType = "string";
-        this.args = [
-            {
-                name: "Delimiter",
-                type: "option",
-                value: DELIM_OPTIONS
-            }
-        ];
-    }
-
-    /**
-     * @param {string} input
-     * @param {Object[]} args
-     * @returns {string}
-     */
-    run(input, args) {
-        const delim = Utils.charRep(args[0] || "Space");
-        let output = "";
-
-        const sanitizedinput = input.toLowerCase(),
-            charcode = Utils.strToCharcode(sanitizedinput);
-
-        for (let i = 0; i < charcode.length; i++) {
-            const ordinal = charcode[i] - 96;
-
-            if (ordinal > 0 && ordinal <= 26) {
-                output += ordinal.toString(10) + delim;
-            }
-        }
-        return output.slice(0, -delim.length);
-    }
-
-}
-
-export default A1Z26CipherEncode;