Identifying a relay from a picture that isn't of the actual car in question is a moot point, there are several relays that it might be depending on the spec and age of the car.
On one of mine that relay was the hazard flasher, on others it may be the consumer relay, or the auto box or the glow plugs etc, etc. Vauxhall helpfully moved a selection of relays around during production, some cars have more relays in that location some less.
If you can get a hand up there you can get a picture of the top of it, (if you don't want to remove it, although that might be the easiest thing).
But the way you phrased the question suggested that you didn't/couldn't/wouldn't do either of these things (because it was raining' prefering to ask here using a generic picture of another car (spec unknown).
I'm sorry that you found my answer unhelpful, but the alternative is to guess, which would actually be of less use.