function programme_enable_pages() {
    add_submenu_page('edit.php?post_type=programmes', 'content', 'Archive content', 'edit_pages', basename(__FILE__), 'archiveContent');
}
add_action('admin_menu' , 'programme_enable_pages');

function register_programme_settings() {
    register_setting( 'programme_content', 'programme_content' );
    register_setting( 'programme_content', 'programme_branding' );
}
add_action( 'admin_init', 'register_programme_settings' );

function archiveContent() { ?>
<div class="wrap">

    <form method="post" action="options.php">
        <?php
        settings_fields( 'programme_content' );
        do_settings_sections( 'programme_content' );

        wp_editor( get_option('programme_content'), 'programme_content', $settings = array('textarea_name'=>'programme_content') ); ?>

        <label><b>Branding options</b></label><br>
        <input type="radio" name="programme_branding" id="branding_blue" value="blueBranding" <?php checked('blueBranding', get_option('programme_branding'), true); ?> checked="checked">Blue Branding<br>
        <input type="radio" name="programme_branding" id="branding_red" value="redBranding" <?php checked('redBranding', get_option('programme_branding'), true); ?>/>Red Branding<br>
        <input type="radio" name="programme_branding" id="branding_orange" value="orangeBranding" <?php checked('orangeBranding', get_option('programme_branding'), true); ?>/>Orange Branding

        <?php submit_button(); ?>
    </form>
</div>

$capability = apply_filters( "option_page_capability_{$option_page}", $capability );

add_filter( 'option_page_capability_programme_content', 'my_settings_permissions', 10, 1 );
function my_settings_permissions( $capability ) {
    return 'edit_pages';
}