215, 217, 218, 219, 220, 221, 222, 223, 224, 226, 229, 232, & 234 are all in Mark IV livery
206, 207, 208, 209, 227, 228 & 233 are all in Enterprise liveries
231 is currently in Mark IV colours but due to be converted to the new livery down the line.
Enterprise Locos can be used on Mark IV's but all the 'Intercity' Locos bar 231 can't be used up north as they don't have AWS or the radio equipment used by Translink