Dear Sir or Madam,
In response to the recent news of progress that Merseyrail have been making in regards to rolling stock procurement, I wish to make a brief suggestion in regards to making this process more efficient and effective.
I would like to suggest that the order for Merseyrail is combined with an order for new Great Northern Inner Suburban stock. These services are primarily operated by 44 units of Class 313 stock, which were built at a similar time to the Merseyrail Class 507/508 fleet, and as such are of nearly identical specification. By timing a potential GN batch to meet the schedule for upgrades on the East Coast Main Line, new stock would take advantage of improvements on the route.
A potential type of new stock would be the Bombardier Class 378. This class has been operating 'London Overground' services for a number of years, so a unit of this type could be loaned in order to assess the classes' suitability on the Merseryrail network. I have heard that a member of the LO fleet has been tested to Moorgate, but I have not found any evidence confirming this. A variant of this type with 2+2 seating would be suitable for both Merseyrail and GN Suburban, in my opinion.
In conclusion, I hope that this brief suggestion will help you in this exciting process. I believe that a combined order would be efficient and effective; improving service on both routes. I look forward to hearing about your thoughts on this, as well as about plans for the future.