I'd look at Station Road, Woldingham - https://www.strava.com/segments/4643102 - as it gains just under 100 metres in 0.7 of a mile, can be done in 5 minutes repetitively (for me) and is a 2 minute descent.
@andyp started
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I'd look at Station Road, Woldingham - https://www.strava.com/segments/4643102 - as it gains just under 100 metres in 0.7 of a mile, can be done in 5 minutes repetitively (for me) and is a 2 minute descent.