My oh does the cricket ground once a year after the season has finished - but he hasn't done ours yet!

Once or twice a year in spring and autumn depending on local conditions - soil type, use of lawn etc. I scarified and aerated my front lawn in spring and it looks good now, the back lawn (heaviest traffic and heavy soil) needs it again going by the yellowing and compaction.

We scarified and aerated our one and only lawn earlier this week..twice a year is usually ample..

thanks for the advice, i'll do it this weekend then again next spring.