Marks & Spencer has extended its Mobile Pay Go service to 50 branches, mainly in London, following a successful trial in six stores.

M&S said the checkout-less technology, which enables transactions to be processed in less than 40 seconds, has handled purchases once every three seconds during busy lunchtimes in pilot stores.

The scheme is now being introduced in shops which are particularly busy during daily peak periods. The retailer said its deployment will enable staff to provide enhanced service and slash queuing times.

By George MacDonald