Female Fly fresh with blood

This Fly called in yesterday. One of those which suddenly show up on your table/desk and which don't really shy away from you.

The long ovipostrum tells me that it is a female. Her red pouch, on the abdomen, indicate a fresh feed, which I am happy to add, is not mine. To me it indicates she'd therefore be ready to lay eggs, because I think females only feed as they need this for laying eggs. Similar to a female mosquito, who (also) is the only one of the Mosquitoes which do bite.
yet this does not help me with identifying the Fly. Because of its red legs, I'm thinking Ichneumon; but perhaps it is a simple Mosquito?
I was glad that she had just fed on some other animal/human, because she was happy to walk onto my finger and walked about my hand while I operated the joystick of my wheels, to be put outside.

If you recognise the specie, or can ID it, please leave a comment.

Small Tortoiseshell Butterfly, Aglais urticae

Have seen very few of these critters. Compared to other years.