This is a new course with start on A420. Start point is TBC but likely to be one of the industrial complexes on A420 near Marshfield. Course is being designed to support the National Road Race Championship in 2023 and uses the U601B course as its backbone

Start: MJ Church Entrance (///petted.trackers.flexed) on A420 head West to left turn (///whirlwind.insurance.surfed) onto B4039 for Yatton Keynell. Continue on B4039 to Acton Turville where turn left (///centuries.marsh.manages) onto Tormarton Road, which then becomes Acton Turville Road.  At Tormarton turn left (///navy.month.Friday) onto Church Road through Tormarton onto Marshfield Road and then Shire Hill and again Tormarton Road to finish on Tormarton Road before A420 at CE Davis entrance (///plantings.vowed.rats)
This is an 18 mile course

There is an option to repeat course to finish on Tormarton Road before A420 at CE Davis entrance (///plantings.vowed.rats) which makes it 37 miles and is U604A
This would mean continuing to A420 junction where turn left (///stumble.questions.deck) and past start and repeating course to finish on Tormarton Road before A420 at CE Davis entrance (///plantings.vowed.rats).