My 2014 freelander 2 sd4 hse lux is due for its last warranty service, is there any point in getting it serviced at a dealer which is more expensive or should I save money and just go to a specialist landrover agent

You always have that choice from day one of ownership. Negotiating a discount with the dealer maybe more simple, as a B Service can be done for £350.

Also maybe depends if you are going to take further years of extended warranty. I have not but I have an older relationship with the trade so can cut out some expense so I am willing to take the risk of a big bill. FL2 MY10 TD4 GS traded in at 2 years
FL2 MY13 TD4 GS Current