I've added a noexit tag to the end of John Street https://www.openstreetmap.org/node/441401666 and have also added the Lidl car park https://www.openstreetmap.org/way/1340039157
Unsure which of the Mansfield Road postcodes to use as Amber Valley Food Standards uses DE55 7JL https://ratings.food.gov.uk/business/605/lidl and Lidl DE55 7JJ https://www.lidl.co.uk/s/en-GB/store-finder/alfreton/mansfield-road-18/ but it should not matter as neither of these are on Nottingham Road or John Street so would expect navigation via Mansfield Road