What a pity that Iberia do not use the Bidair lounge, which I spent some time in recently while waiting for the Virgin Clubhouse to open.

I bought a two-hour pass online in advance but was allowed to stay a bit longer. It was comfortable, with a good bar, free wi-fi and excellent staff. The only let down was the food offering, although this was not a disaster by any means. If you are going to be a long time airside in JNB and are not confident of getting into the BA lounge then you might want to consider buying a pass for this, although I have no experience of the Rennies joint to compare it with.