In reply to Padraig-US:
Some interesting posts. Martin B's is probably the most helpful in reality.
If you are looking for classic UK climbing then forget sports climbing which only gets good at the hard end of the spectrum. There are exceptions but our main crags are not bolted and so sport climbing tends to be in fairly dismal quarries. There are of course some exceptions but, given your grades and apparent preference for trad, I'd focus on that.
Sounds like you lead around VS trad in our grades and your sport grade probably puts your seconding ability in the low Extremes (E1/E2 maybe).
Blackpool is actually quite well placed within easy (ie. less than 2 hours) striking distance of classic rock climbing in the Lakes, N Wales (Snowdonia) or the Peak District. We don't really have alpine stuff, unless you head well up to Scotland and, say, the Isle of Sky - which you aren't really going to manage on a weekend. Most of our trad is either single or fairly short multi-pitch, though we do have some longer routes in the mountains. However, many of our classic climbing is of a 'cragging' nature (ie. single or short multi-pitch) and that is probably where you will find our best routes.
We do have a lot of rock types for a small area, from the high friction but rounded gritstone (short routes generally) of the Peak District to the more positive volcanic rock (and generally longer routes) of N Wales and the Lakes.
For a variety of classic and historic routes I'd probably head to N Wales. If the weather is good there are some great classics in the Llanberis Pass. If the weather is not so great in or around Llanberis (in the mountains), it's often ok at Tremadog not far away but nearer the coast. In fact, Tremadog is so good that you might want to spend a day there anyway. If you fancied something really different and quite adventurous, maybe even think about getting on Dream of White Horses - maybe the most classic and sought after HVS in the country (VS climbing but in a stunning, and scary, position) on the Gogarth sea cliffs in N Wales.
Obviously do some research but have a think about the following in N Wales:
Llanberis Pass
On Dinas Cromlech in ascending difficulty, look at Dives/Better Things (HS), Sabre Cut (VS), Cemetary Gates (E1), Cenotaph Corner (E1), Left Wall (E2).
Across the road on Dinas Mot, think about the Direct (VS), Diagonal (HVS) and Superdirect (E1).
At Tremadog, you could have a day climbing a stack of classic multi-pitch routes from Severe to whatever grade you like but it is probably best at around VS to E2 which is where you seem to be operating. Almost too many to bother listing for you right now. The routes are often slabby, though many steep ones too, with good protection possibilities and very positive rock. Easy access (more or less roadside) and with a great café to 'refuel' between routes.
As I mentioned, also have a think about Dream of White Horses (HVS) on Gogarth not far away from Llanberis/Tremadog.
The Lake District has a load of great climbing too and is, arguably, even better scenery than N Wales and better pubs etc by and large (but also more expensive!). Due to the main type of rock, the climbing is in some ways more subtle (and some would say more rewarding) than N Wales, the gear takes a little more thinking about on the whole and, for whatever reason, there seems to be less obvious and striking "lines" (if that bothers you). Oh, the weather is also about the wettest in England and Wales as well.... In all seriousness, the Lakes is a v beautiful area and you might want to visit it anyway and the climbing is excellent and often among stunning scenery.