Lumo, the low-cost electric rail operator running between London and Edinburgh, is significantly stricter regarding luggage than traditional UK train operators like LNER or Avanti. Because Lumo trains are designed with a high-density "one class" seating layout, overhead storage and luggage racks are limited. Each passenger is strictly permitted one small personal item (like a handbag or laptop bag) that fits under the seat and one large suitcase that must not exceed 63 x 41 x 27cm. If your bag is larger than this, you are required to use their "LumoEats & LumoCourier" service, which must be booked at least 24 hours in advance to have your luggage shipped separately. While staff may not weigh every bag, they do monitor the size at the boarding gate; if the train is full and your bag exceeds the limits, you may be denied boarding or asked to pay a substantial "excess luggage" fee. For travelers with multiple large bags, Lumo is often less convenient than traditional carriers that offer more generous, unmonitored storage space.