lnav/src/keymaps/uk-keymap.json

{
    "$schema": "https://lnav.org/schemas/config-v1.schema.json",
    "ui": {
        "keymap-defs": {
            "uk": {
                "x22": {
                    "command": ":goto last 20 minutes after the hour"
                },
                "xc2xa3": {
                    "command": ":goto last 30 minutes after the hour"
                }
            }
        }
    }
}