Royal Mail are not worth even a start. I have lost hundreds of pounds and a lot of credibility in front of my suppliers because they have repetedly failled to deliver my parcels to my building which is located in central London. All parcels went to a different unknow address. I have raised dozens of requests with them and none was sorted. After 1 year they have not updated the address in their systems. All I can do now is order online only from suppliers that have other delivery methods than Royal Mail. I had to apologise to all my neighbours for knocking at their doors and suppliers for requesting for refunds. Terrible experience. Never trust Royal Mail with delivering important items.