Update:
Thanks for everyone tips and help.
I got lazy and decided to get an independent garage to do the job (parts and labour). However they were charging me 370 (parts and labour) for the full monty service as recommended to me by you guys (minus coolant fluid change).
I then decided to order the parts myself. I went for the below deal and bought engine oil (0w30), coolant and brake fluid.
http://www.coxmotorparts.co.uk/genuine-honda-accord-diesel-major-service-kit-0608-p-748.html
I got the parts delivered the next day. (£130 all in)
One of my friend's brother in law has a small garage and so I headed there yesterday afternoon. I stood and watched the whole service so I could learn what to do next time myself.
The guys whizzed through the engine oil change, oil filter change, air filter, pollen filter in no time. They were saying I dont need the fuel filter change and my friend was adamant they change it (i can understand why now). It took one of them a while to change the fuel filter....not an easy job.
They topped up the coolant.
I havent done the gear box oil change and brake fluid change. The garage guys gave me discount and charged me £40. I had peace of mind knowing that I had used genuine parts. The car seems to be happy and driving no problems.
How important is it for me to change the gear box and brake fluid?
I'll be driving on Xmas day to North England from Reading