From Boston head west along the A17 taking the exit for Kirkby la Thorpe near Sleaford.
Follow the signs for Ewerby (approx 2 miles away).

From Lincoln follow the A15 South until you get to Holdingham roundabout, then take the A17 east exiting after 4 miles at Kirby la Thorpe and taking the immediate left signposted to Ewerby.