Not sure where the 176 million would come from, a googlesearch of "dort.co.uk" only brings two results, both are activity at acorndomains so nothing that would get the domain any traffic or PR.
What is a Dort? it's not a word in common useage here in the uk.
I've searched googlemaps for dort - theres no such place in the UK, so a placename is outa the window.
Appraisal... it's a 4 letter domain so might be worth something to some obscure organisation for whom its an anacronym but to be honest i've let better .co.uk domains drop at renewal.
Jim