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Thanks for your response Yannick, its much appreciated.

Thanks. It's a finance site and they've decided to make the entire visible site on https, not just specific pages. The http URL redirects to the https version.

Thanks for your response Aaron. Thats why I asked the question because we have done some 301ing in the past and I am pretty sure PR was transferred pretty sharply however, it does not seem to have done so on this occasion. Cheers