That is an almost impossible question to answer.Just wondering whats the best dry fly rods? Mid range
okayThat is an almost impossible question to answer.
First of all, define mid range?
Secondly, you need to define the type and size stream and fish size, etc., in order to answer.
That question is so broad you really need to define exactly what all of your parameters are.
You didn't mention your desired weight and length (I'm guessing a 4 or 5 wt between 8'6" and 9') or what action you prefer, but.....
Just based on reviews I've read over the years, where you're located and perceived budget (mid-range = $400-$550 USD?), if you want new you might consider the Hardy Shadow or, if you can find a leftover closeout, the Hardy Zephrus Ultralight. If you like slower, full-flexing rods, the Douglas Upstream 8'8" 4 wt is a nice rod and under $400 USD, at least before any duties and shipping (not sure if available there).
If you'd consider used, then lots of options: Scott GS, Sage Circa mentioned above (deep flexing), too many others to list. It really depends on what action/flex profile you like.
I was thinking 8’6” and a medium action rod around £200-£400
Im more of a medium action rodI fish nothing but dry flies. My favorite size is an 8 1/2' for a 5wt. Some like a 4wt but Colorado is windy and I like the 5wt better.
As for the action? I'm a fan of bamboo but i'm not recommending it to someone asking what rod to use. I'll use a med action in graphite but for someone new i'd say a faster med action or med-fast. I like to feel the line load the rod. Even for short casts. It's not needed. I just enjoy the feel.
I suggest you go to a fly shop and test cast some rods. We all have a different tempo and you need a rod that suits your tempo.