OK - here's the route. I've had to change a few bits near Blackburn because although the route looked ok on a map, google street view told me that several of the turns were not signposted.
I'll print a few copies and have them with me - as well as copies of the route onwards for those of a curry-tasting disposition.
The onwards route has Parbold Hill and the Legh Arms by special request...
Starting from The Sandpiper, Bickerstaffe. L39 0HD Leaving 2pm.
Turn left on to A570 and continue to traffic lights by Stanley Gate PH.
Turn right (Lathom Road) to T junction.
Turn left on to B5240 (Lyelake Lane).
Just after Warbreck Garden Centre, gentle left on to A577 and almost immediately right on to B5240 (Plough Lane) Signposted Pilkington Technology Centre opposite junction and Parbold Burscough B5240”on right side of road.
At mini roundabout turn left. Signposted Liverpool Preston (A59) Southport (A570) Burscough A5209
At second mini-roundabout turn right (Junction Lane) Signposted Preston (A59) Burscough B5241
Through traffic lights on bridge to another set of traffic lights. Turn right. Signposted Preston A59
After passing Rufford Old Hall (National trust) on the right, prepare to turn right. Just after passing Rufford Arms Hotel, at the ghost island, turn right on to A581 Signposted Croston Chorley A581
After Croston Village, turn right (still A581) Signposted Chorley A581 Leyland (B5253)
After passing the Elephant (Indian Restaurant) prepare to turn left. On the bend (SLOW marked on road), turn left on to Runshaw Lane Signposted opposite junction (small fingerpost) Leyland 2 1/2
Stay on Runshaw Lane, crossing bridge over M6 and through Euxton to traffic lights by Bay Horse PH.
Continue straight ahead (Euxton Lane), under railway bridge and continue through next set of traffic lights.
At the roundabout, take 1st exit. Signposted Chorley B5252 (A6) Motorway M61
After the hospital, turn left on to A6 then after Hartwood PH turn right at the roundabout Signposted Manchester (M61) Blackburn (M65) Preston (M6) A674
Continue straight ahead at motorway roundabout. Signposted Wheelton A674
After passing Hoghton Arms PH at motorway roundabout take the 3rd exit. Signposted Blackburn A674
At traffic lights turn right Signposted Blackburn A674
At Feniscowles, turn left on to Pleasington Lane Signposted Pleasington also brown sign for Pleasington Golf Club.
Pass Railway PH and station. Pass Butlers Arms PH and Pleasington Priory. Pass Clog and Billycock PH. Turn left at traffic lights on to A677
At next traffic lights continue straight ahead. Signposted (M6, M61) Preston (A59) A677
After passing Shell station on right, arrive at KFC on left for coffee stop.
Post Code for KFC is BB2 7BU
Afterwards - turning left out of KFC will take you to M6 Junction 31.