[Plugin: Jetpack] 400 error in debug

Hi trying to get jetpack connected. at the moment the wp.com dash has an error
There was an error retrieving your site settings.
and the jetpack debug has this

SELF:
	Array
(
    [headers] => Array
        (
            [server] => nginx
            [date] => Tue, 14 Jun 2016 14:29:32 GMT
            [content-type] => text/plain;charset=utf-8
            [connection] => close
            [expires] => Wed, 11 Jan 1984 05:00:00 GMT
            [cache-control] => no-cache, must-revalidate, max-age=60
            [pragma] => no-cache
            [x-hacker] => Jetpack Test
            [x-ac] => 3.lhr _dca
            [strict-transport-security] => max-age=15552000
        )
    [body] => {"error":"Communication error","error_description":"We were unable to make an XML-RPC request to your website. Please make sure that XML-RPC is turned on and that Jetpack is installed, activated and connected with your WordPress.com account. If the error persists, try disconnecting and connecting Jetpack again."}
    [response] => Array
        (
            [code] => 400
            [message] => Bad Request
        )
    [cookies] => Array
        (
        )
    [filename] =>
)

I can get a hello! message from a direct post to https://www.mindtools.com/blog/xmlrpc.php

I have disconnected both sites (multisite) and reconnected them and get the same issue. I am trying to include posts from one site to the other using the jetpack widget.

Any help appreciated

Sam.