Choosing the right auctioneer is crucial for when your selling your property, it could be the difference between a good and a bad price or even the property selling or not. So, do your research.
Personally I would consider using a London auctioneer if the property was right for it, because that's where a lot of the investor buyers live and are based. You could find that, that works well for you.
However, if your property is more in the provinces, a lot of the local buyers, who are your key market, might not be willing or able or aware of London auctions. So, you might want to consider putting it with a local auctioneer, who after all will probably know the market in your area much better.
Whichever auctioneer you do choose, make sure that they're going to instruct a local estate agent to carry out viewings, because that agent will help to spread the word of the property to investors and buyers that they know and also that they put up a for sale buy auction board, which generate a massive amount of interest wherever the auction's located.
Of course, in the days of the internet now, on smart phones and so on, people can very quickly see a board and look up the auctioneer wherever they are.
So, you want to get your property out to as many people as possible in order to get the best possible price and to do that, it's a board, a good auctioneer and make sure that you've done your research.