I would like to check my understanding of how to use the weights from the covid survey. If I'm combining with earlier full waves (e.g. wave I) would I just use the most recent _xw weight from the covid surveys? Do I need to talk about any caveats from using this weight when looking back on earlier full waves or is it completely fine to use as I would normally? Will it still be representative in the same way or do I need to make sure to point out that only those who answer the covid surveys are in the sample and that this may not be as representative of the UK as usual?