The image shows a GE Powerhaul locomotive with UK loading gauge, that has been assembled by Tülomsas in Turkey. The green machine was already completed in February 2011 and used as demonstrator by the Turkish railways. Then it was shipped to the UK.
The locomotive arrived at the harbour of Newport on 16.10.2012, where the Turkish stickers still had to be removed. The machine now carries service number 70099. - WW/MB
update: Currently the unit is at BRUSH works in Loughborough, for evaluation prior to tests with freight companies in the UK. - DA
Related sections:
PowerHaul (GB): DE 37001 / 70099