For me Curleys is one of the best, not exactly easy but very rewarding when you get it right. Twin Laked, well I personally hate the place.
For some others try here:
http://www.go-fish.co.uk/lancashire.htm
Theres also Pendle View at Clitheroe, not my cup of tea but quite good if your just starting out (fish a blob under an indicator if you want to catch plenty). There's two on the A6 just outside Lancaster, one is on the golf course next to the Uni the other is just down the road (heading south), its called Mere Clough or something like that!
Theres Mere Beck, thats about 10 mins from Twin Lakes. The also a new one nr Chorley call Oak Royal, but take a hard hat and be prepared for someone 'playing through' your swim
Im sure some more will be posted.