Purge not working

Purge isn’t working on either of my Varnish boxes. The request is getting there, but it’s not being actioned:

11 RxRequest    c PURGE
   11 RxURL        c /.*
   11 RxProtocol   c HTTP/1.0
   11 RxHeader     c Host: dev.example.co.uk
   11 RxHeader     c User-agent: WordPress/4.1; http://dev.example.co.uk
   11 RxHeader     c X-Purge-Method: regex
   11 RxHeader     c Accept-Encoding: deflate;q=1.0, compress;q=0.5, gzip;q=0.5
   11 VCL_call     c recv
   11 VCL_acl      c NO_MATCH purge
   11 VCL_return   c error
   11 VCL_call     c hash
   11 Hash         c /.*
   11 Hash         c dev.example.co.uk
   11 VCL_return   c hash
   11 VCL_call     c error deliver
   11 VCL_call     c deliver deliver
   11 TxProtocol   c HTTP/1.1
   11 TxStatus     c 405
   11 TxResponse   c Not allowed.
   11 TxHeader     c Server: Varnish
   11 TxHeader     c Content-Type: text/html; charset=utf-8
   11 TxHeader     c Retry-After: 5
   11 TxHeader     c Content-Length: 397
   11 TxHeader     c Accept-Ranges: bytes
   11 TxHeader     c Date: Wed, 21 Jan 2015 20:52:35 GMT
   11 TxHeader     c X-Varnish: 140119601
   11 TxHeader     c Age: 0
   11 TxHeader     c Via: 1.1 varnish
   11 TxHeader     c Connection: close

Any help would be greatly appreciated.

Thanks

https://wordpress.org/plugins/multi-varnish-http-purge/