If £200 is too expensive for you and you still want a 6-core 12-thread processor then the AMD Ryzen 5 3500 could be a worthwhile option.
A listing on the Eurasian Economic Commission, via @KOMACHI_ENSAKA, shows a submission for several AMD Ryzen CPUs: the 3900, the 3900 PRO, the 3700, the 3700 PRO, the 3600 PRO (worth noting the already released 3600 is also listed), and the 3500. All of these are 65-watt parts and all of them, with the exception of the 3500, have a part ID (meaning these parts probably will come to market) and have core counts labelled.
At the moment not much is known about the AMD Ryzen 5 3500, last year there was 2500 which was an OEM only CPU so the same could be true this time around.
The AMD Ryzen 7 3700 could end up being the best of the bunch as the R7 2700 was very popular last year, with a little overclocking is was often just as fast as the 2700X.
The Ryzen 9 3900 is an interesting entry, as it is listed as 65W whereas the 3900X has a TDP of 105W, so the clocks could suffer a bit and it may be hard to overclock it to the 3900X levels.
It is likely that some of these new parts will be OEM only so you won't be able to buy them directly. However, I would expect the Ryzen 7 3700 to come to retail.
There is no confirmed release, therefore, no release date, but you can probably expect them in the second half of 2019.
|CPU||R5 3500||R5 3600||R5 3600X||R7 3700||R7 3700X||R7 3800X||R9 3900||R9 3900X||R9 3950X|
|Base||TBD||3.6 GHz||3.8 GHz||TBD||3.6 GHz||3.9 GHz||TBD||3.8 GHz||3.5 GHz|
|Boost||TBD||4.2 GHz||4.4 GHz||TBD||4.4 GHz||4.5 GHz||TBD||4.6 GHz||4.7 GHz|
|Cache||35 MB||35 MB||35 MB||36 MB||36 MB||36 MB||70 MB||70 MB||72 MB|