The joint PCS/UVW strike action by outsourced workers demanding equal treatment at Royal Parks started on Monday the 16th and is set to run till the 30th August. You can donate to their strike fund here, and email their bosses in support of the strike using a tool here. In other PCS news, DVLA workers are striking over Covid safety through the whole of August. Another long-running strike continues in Bexley, where bin workers are still on strike over pay and victimisation issues, and have previously warned that the dispute could stretch out into October.
Also, pretty much all the health unions are running pay ballots of some kind at the moment, so those are important to vote in for anyone who works in that sector. See Health Workers United for more on that.