Adam's Grave Long Barrow Winter Solstice Sunrise Alignment

I posited some time ago that Adam's Grave Long Barrow was aligned to the Winter Solstice Sunrise.

(Suncalc lines of Solstice sunrise and set for Dec 21st.)

I visited again today to photograph the sunrise and the full orb appears to be in line with the barrow.

(click to enlarge)

Now to check Kitchen Barrow next summer - because of the slope the calculate line and the actual may vary significantly.