This is what Monarch tend to do when they recieve new aircraft. In 2009 & 2010 the 2 Ex EasyJet A321's were based in Manchester. In 2012, the two Ex First Choice A320's were based in Birmingham. This year the two A320's with sharklets will be based at Leeds/Bradford and the 2 Ex. Cyprus A321's will be based at East Midlands. I'm not sure where the other new aircraft are being based (if they are being based at a pacticular base)
