Need Help To Modify Code That Adds RRP to Woo Commerce

Hi, I need to add a RRP to Woo Commerce I have the code for it here courtesy of business bloomer:

/**

* @snippet Display RRP/MSRP @ WooCommerce Single Product Page

* @how-to Watch tutorial @ https://businessbloomer.com/?p=19055

* @sourcecode https://businessbloomer.com/?p=20727

* author Rodolfo Melogli

* @testedwith WooCommerce 2.6.4

*/

//


// 1. Add RRP field input @ product edit page

add_action( ‘woocommerce_product_options_pricing’, ‘bbloomer_add_RRP_to_products’ );

function bbloomer_add_RRP_to_products() {

woocommerce_wp_text_input( array(

‘id’ => ‘rrp’,

‘class’ => ‘short wc_input_price’,

‘label’ => __( ‘RRP’, ‘woocommerce’ ) . ‘ (‘ . get_woocommerce_currency_symbol() . ‘:wink:

)

);

}

//


// 2. Save RRP field via custom field

add_action( ‘save_post’, ‘bbloomer_save_RRP’ );

function bbloomer_save_RRP( $product_id ) {

if ( defined( ‘DOING_AUTOSAVE’ ) && DOING_AUTOSAVE )

return;

if ( isset( $_POST ) ) {

if ( is_numeric( $_POST ) )

update_post_meta( $product_id, ‘rrp’, $_POST );

} else delete_post_meta( $product_id, ‘rrp’ );

}

//


// 3. Display RRP field @ single product page

add_action( ‘woocommerce_single_product_summary’, ‘bbloomer_display_RRP’, 9 );

function bbloomer_display_RRP() {

global $product;

if ( $product->product_type <> ‘variable’ && $rrp = get_post_meta( $product->id, ‘rrp’, true ) ) {

echo ‘<div class=”woocommerce_rrp”>’;

_e( ‘RRP: ‘, ‘woocommerce’ );

echo ‘<span>’ . woocommerce_price( $rrp ) . ‘</span>’;

echo ‘</div>’;

}

}

However I have a pretty complex currency converter added to the website and if for example I add £10 to the RRP when the converter is used it changes it to $10 which is obviously wrong is there any way to just add a static £ symbol so that every RRP remains in pounds regardless of the currency change. Thanks!