Aeshna grandis?

I think this is the Brown Hawker Aeshna grandis which according to my book is the only Aeshna species in Great Britain and Ireland that has brown wing venation, and the membrane (the clear bit between the wing veins) is a pale amber colour. I don't think I have seen one before, but I saw 2 in my garden today - a male and a female.

If I have the ID wrong, please let me know!