Ours was about a grand but then we went really small and cheap!
I think the registry office was about £90,
The 8 or so cakes (all gluten free) which I made the day before the wedding would have cost about £10 or so in ingredients,
Ian hired a suit for about £70 and bought a waistcoat for about £40,
We donated about £100 to the place where we had the religious part of our wedding done (we're buddhist, so it was a small buddhist temple),
I bought my wedding dress off ebay for about £40 - it was an Indian lengha outfit and made over there to my measurements,
I made some chocolates at the same time as the cakes as gifts for people involved in the wedding, ingredients for those, plus nice boxes to give them in would have cost about £20,
Friends took photo's (but received chocolate in return lol),
We took about 40 guests to a local curry house for an evening meal (everyone ended up giving eberyone else lifts between venues, so we canceled the taxi's we'd booked) and that cost about £800,
I didn't have flowers as in my husbands tradition cut flowers represent being cut off the teachings - plus we had to carry candles into the ceremony to light a wedding candle, so flowers would have got in the way lol.
So the wedding itself was just over 1k, but we did buy rings well in advance and I think they cost about £500, plus my engagement ring which had cost the same, although we'd obviously bought that a long time before.
I reckon it can be done cheaper than I did it, I could have made food for the evening meal myself, but I would still have had to hire a place. The main thing is to plan something that you will enjoy and that will be meaningful to you