To close or not to close?

I have often read on here, that it is hard to strike the balance as to what to do with unused cards. On the one hand, I have a lot of unused cards, but on the other hand I do currently have a utilisaion of 47% and obviously closing some cards, will increase this utilisation. Furthermore, a lot of my unused cards are quite old, showing some stability. Am playing the balance transfer game, hence the top heaviness amongst cards

What cards, if any do people think I should close looking at below current state of affairs?

Card / Balance / Limit / Age

Aqua / £0 / £4950 / 8 yrs

Vanquis / £0 / £3000 / 12 yrs

Tesco 1 / £2857 / £3250 / 1 yr

Tesco 2 / £2800 / £2800 / 2 months

MBNA / £5182 / £5400 / 1 yr

MBNA 2 / £2585 / £3000 / 1 yr

Capital One / £0 / £2500 / 7 yrs

Santander / £0 / £3700 / 3 yrs

M & S / £143 / £5500 / 4 yrs

Barclaycard / £2687 / £2900 /4 yrs

Any advice welcome.