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(this is my first post here, but I have lurked for a while)
Not easy to say what species this is just from the pictures, but lets try anyway :)

You can rule out a few species, even if all the characters are not visible: the specimen has 3 post acr (postsutural acrostichial setae), and you can rule out ampullacea, caesar, illustris and bufonaria, as these all have 2 post acr.

Also, the first flagellomere is about 4 times longer than wide.. Using this criteria alone, you can then rule out L. richardsi, L. regalis, L. ampullacea, L. bufonaria, L. caesar, L. magnicornis, and L. illustris.

Combining these two characters alone, we have ruled out quite a lot of species. Among those not ruled out is Lucilia sericata and Lucilia silvarum.

Now, the width of the frontal vitta of female L. silvarum is definetly less than 2 times the width of the fronto-orbital plates, but about 2 times the width in L. sericata. Measuring the frontal vitta and the fronto-orbital plates at the image, we see that the frontal vitta is 2 times the width of the fronto-orbital plate.

Based on the above, I would say it is most likely that the above female is a specimen of Lucilia sericata. To be absolutely sure however, I would have had to have the specimen in front of me.

Now I'll take a closer look at the male...maybe I can come closer to what that is as well.

It is a bit more difficult to establish the chaetotaxy of the male, but I think it has only 2 post acr. It is not that easy to get a correct value of the length vs width of the first flagellomere, but it seems to be somewhere between 3.5 and 4.2 longer than wide.

The 2 post acr excludes sericata, regalis, richardsi and magnicornis, and silvarum, but includes bufonaria, caesar, illustris and ampullacea.

I can't get any further than that with these images, I am afraid.