Trouble with anything fast growing in the climber department is they don't stop, they just keep on going for miles. If its not exposed to cold northerly or easterly winds, have a look at Trachleospermum jasminoides - its evergreen, fragrant white flowers in summer, but quite well behaved and won't grow a mile a minute.

if you want something reeeeally fast then 'russian vine' ( sometimes called mile-a-minute)!! BUT its a thug and hard to control as it is so vigorous, theres honeysuckles of course but not many vigorous plants are evergreen so maybe the answer would be to mix them with things like clematis,and some evergreens if you scroll down to the section at the bottom of the page and click on C then climbing plants that should give you some ideas

thanks for the suggestions thought about Russian vine but the fact it takes over worries me

How about seeing if you can find some sweet pea plants still in pots to plant out and cover the fence for the summer, then by the time they're over you'll have been able to decide which plant you want to go with permanently, and you can plant it and get it established in the cooler weather, which it will prefer anyway?

Russian vine's horrible anyway, looks okay in flower, otherwise nothing attractive about its leaves, and the fact it'll grow through a 30 foot pipe and come out the other end and continue on should be enough warning about it, lol! If you choose Trachleospermum, best planted now or next spring, not in autumn, but anything you plant now should be kept well watered.

virginia creeper is nice or an ornimentle grapevine . you will have to keep them trimmed back but there nothing like russian vine and stunning in autumn . thing is you cant have the cake and eat it realy .

fantastic replies, thanks I think I may go for virginia creeper

cool it is a nice plant jayare there is a much redder veriaty thats a bit slower growing but there both good though the greener one is quicker and wear it touches the ground you get a new plant .

I don't know if it matters, but virginia creeper isn't evergreen, so no cover in winter.

but it will cover it quick now