This looks right to me but I thought best to confirm it. The marks on the upper abdomen on mine are not well defined but I think they can vary. Legs, thorax hair colour etc look to match.
http://www.gardensafari.net/english/picpages/eristalis_tenax.htm
I found a key for Eristalis which to me sounds a bit like double dutch.
http://home.hccnet.nl/mp.van.veen/KEYS/Eristalis/eristkey.html#item6
Eyes wide apart would be a female.
#2
#3
I came across another pic of Eristalis tenax with a face view, the hairs as mentioned around the eyes and pics are a dead ringer for mine so I will close this.
http://www.gwydir.demon.co.uk/insects/eristalis.htm
I also have a female Eristalis arbustorum!
http://www.bioimages.org.uk/html/P3/P39452.php
