Remote shutter control?

Does any one know of a remote shutter control which can used either with my E520 or my new XZ2 (not necessarily at the same time) when doing tripod and flash work? UK source, if any, would be helpful.

My local shop tells me that Oly don't offer one, but they may be able to get a third party item. I would consider buying two different units, one for each camera, if required.

I know that use of shutter delay, say 2 or 12 seconds, gives similar result but have found that there are times when one has to be away from the camera.

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telpix