A Britgrav Weyl Tensor Research: Find Paper Authors, Title & Accessibility

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I hope to get a reference to work that was described in a paper at Britgrav, on the effect of extreme variation of the Weyl tensor.
In the earlier years of Britgrav there were sometimes longer presentations of research done at the host university. In one such, about 2005 or so, a presentation showed that an isolated region of space could be rotated through 180 degrees by the action of extreme waves in the Weyl tensor. Unfortunately, I cannot remember which Britgrav year included this paper, nor the name of the paper, nor the names of the authors.

I would like to know the author(s) of the paper, it's title, and if the paper is still accessible.
 
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I am not familiar with the work.

However, here are some search strategies that may be fruitful.

Beyond the obvious google searches:
https://www.google.com/search?q=britgrav
https://www.google.com/search?q=britgrav+weyl
https://www.google.com/search?q="britgrav"+"weyl" (quotes are for exact matches of phrases)

There is the scholar.google.com search
https://scholar.google.com/scholar?q=britgrav+weyl

Fortunately, there is a wikipedia entry
https://en.wikipedia.org/wiki/BritGrav
which links to many of the conference pages, which often lists the program[me]s and participants and abstracts.
(BritGrav 2 isn't there... but you can look here:
https://arxiv.org/search/?query=britgrav&searchtype=all&source=header )

Unfortunately, some pages are 404
http://britgrav2017.physics.ox.ac.uk/index.asp
In that case, one can prefix the url with http://web.archive.org/web/*/ ,
e.g.
http://web.archive.org/web/*/http://britgrav2017.physics.ox.ac.uk/index.asp
Choose the year, the blue-circled date on the calendar, then the snapshot link offered for that date.

Good luck.

If you find it, please share the reference
and the method you used to track it down.
 
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A very belated thanks.
 
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From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...
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