hereA Transport for Greater Manchester spokesman said they were using a mix of single and double trams across the network.Danny Vaughn, head of Metrolink, said: "We are using all the trams available to us and running as many doubles as possible across the network."Unfortunately, it is not possible to run every service as a double or have our entire fleet on the network at any one time."He said regular maintenance - as well as vehicle removals due to damage or extra maintenance - also led to