How do I invest in the Johannesburg Stock Exchange

[TreesieA]

Hi, I've got some Nedbank shares which moved to the Johannesburg Stock Exchange a few years ago that are still stuck in a UK Stocks and Shares ISA with iWeb. I now want to sell them and iWeb doesn't trade on the JSE. I know, I really should have sold them before they moved to the JSE! But I'm now in the position of trying to find a relatively easy and low cost way of selling them. Can anyone recommend a JSE broker that will make this as painless as possible please. I only have 6 shares (around £1k valuation).