I will be going 10mās, if not then i will have to mount it on the mast and that i didnt want to
do due to the heat off the summer house roof 
As it stands, i cannot find any 6 core connectors locally anyway
No, itās a totally digital sensor now, SHT11 until recently, now SHT31 I think. It uses 2 wire serial comm similar to I2C which is usually only used for on board or board to board interface, but apparently it works over longer distances.
IS that gonna be too long?
Donāt know. Based on the chipās datasheet Iām surprised 5-6 m works for weatherc so all bets are off :dontknow:
oh well, only one way to find out going the other way would cost a fortune in cable x3 
Ald old thread about the subject: http://www.weather-watch.com/smf/index.php?topic=48099.0
EDIT: Anoher one whre Sensirion have answered 3-10 m should be fine: http://www.wxforum.net/index.php?topic=14091.0
Good find 
Bottom line, never read the datasheet before you try something :lol:
Carrying the SCK and DATA signal parallel and in close proximity (e.g. in wires) for more than 10cm may result in cross talk and loss of communication.
I guess itās pretty safe. With the serial comm protocol and checksum system I doubt you can actually get wrong values in the data, if thereās a problem I think it will be garbage data that the ISS will reject.
Yep, trial/error was my route there too. As i needed at least 2-3 m back then did i the 5-6m wire as a test as longer wire = easier to get located nicely. I had in mind that it may not work, but it have worked just fine. As its a ānormal, but 6-core phonewireā had it been easy to cut and add a new RJ-plug at the end if it not worked.
Fenland?
(though Breckland might be more appropriate for this thread - sure Bashy will explain to the uninitiated)
I didnāt know that oneā¦
Brexitland?
good news re cable all being well, thanks guysā¦
You would think so wouldnt you, Brexit gets the blame for most :lol: :lol: :lol: not this time though lol
Breckland (or The Brecks) as a landscape region is an unusual natural habitat of England. It comprises the gorse-covered sandy heath that lies mostly in the south of the county of Norfolk but also in the north of Suffolk. ... The Brecks are one of the driest places in England.
IS there another way to mount the OS anemometer on to a 40mm pole other than attatching a smaller pole, i think the u-bolts are 30mm?
Big assumption that the ISS actually checks checksums? 
True :lol:
Did i say that??
Now i know at least from where not buy possible new Davis-toysā¦
Finally on the mast, still awaiting the connection for the temp so Davis still not live yet, I am seeing crazy uv requests but they appear when I am working on them, 12uv plus :o
I dont blooming believe it, i made the OS anemometer bird proof and the solar & UV, i left the
Davis anemometer thinking thats prob too small, LIKE HELL IT IS, frigging dovesā¦ I got it
all nicely setup now too, really didnt want to be bringing it all down again