I done a similar tour (within 100 miles of my home) and visited quite a few LFS but not all in one day though.
I think I visited 5 LFS in one day, Swindon (2), Oxford (1), Lechlade (1) and Cirencester (1) and a few others on other days Gloucester (2), Stratford-upon-Avon (2), Worcester (2), Kidderminster (1), Shrewsbury (1), Nantwich (2), Hereford (5) and a few over the border in Wales. I also have visited a few up in the Chester/Wirral/Wrexham area.
I enjoy looking around other LFS and seeing what's available (fish) and at what price.
My local Maidenhead Aquatics (Hereford) used to be good but the franchise is now under new ownership and it's gone downhill very quickly, the senior staff members have all left.
I enjoyed reading your reviews.
All the best