Make your booking in advance, complete with your London City hotel information and your Eurostar details. 24-hour service is available daily, so even if you have an early morning train or last train out at night, your reservation is secure. You'll receive confirmation and a voucher at booking to present to your driver at pickup.
At the requested pickup time, your driver will arrive and provide luggage handling (gratuity is optional, but appreciated) before setting off to St. Pancras station in a comfortable vehicle. Pricing is for a private transfer, so it will be the same price for upwards of eight passengers.