according to my rail worker source the rails buckle in the heat and cause uneven rail surface meaning they have to either slow down or stop use altogether. some places have a 20 mph limit due to expansion.
I wondered how continous rail welding would work? Rather than the clack clack..rail travel..but the issue is overhead power rails..
I do not understand how an overhead power supply system would fail, if there is an issue, the front pantograph is retracted, to avoid the issue, where the rear pantograph is still in use, and switched if there is an issue....The heat isn't excessively more than any other country using this system on a daily basis. Network Rail are shipping in heritage locomotives, including a steam engine, to provide a normal service, when the locomotives, that have been bought, and ought to be used on these services, are underpowered, and not fit for use, and MOST have been shipped abroad, as foreign contract pay more than for use on Network Rail. And have been modified with aircon for the driver, which isn't useable on the UK network, as it breaks the UK rules..
So a locomotive less than 10 years old is shipped off to Poland, and we have a 60 yo locomotive, that was farmed off 20 years ago? That is more powerful, more reliable, and able to do the job.