Thankyou all for your kind contributions.
Lostitude, I took your advice and it helped me a lot. I decided to read Thanisaro's "Into The Stream" on Access to Insight and this gave me some good motivation which I was also lacking in, this evening I sat for just under an hour with no pain, I paid particulate attention when boredom arose and I countered it with my motivation to work towards Sotapanna and that there is nothing more beneficial I could be doing. Of course the hindrances won in the end, but a great improvement.
Sam Vara, I am practising Moral Discipline, manage to keep the 5 precepts and follow the Uposatha, I have been feeling some aversion quite recently which will have affected the mediation, and I will be doing some Metta tomorrow to try and counter it.
Pyluyten, I have not done walking meditation yet but I am very interested. To be honest I was going to wait until I get to Amaravti, but may start earlier as I'm sure it will benefit the practise.