In reply to llanberis36:
That's a high grade for building stamina but if the routes are too low, start maybe missing out a few holds to make it more difficult.
In the peak area Awesome walls sheffield has a single (soft) 7a route across all 3 autobelays, nottingham has a single english tech 6a on its.
I guess you could down climb occasionally to vary things a bit.
Leading would be better because it slows you down more etc.