This from unionhistory.info
"Between 1980 and 1993 there were six Acts of Parliament which increasingly restricted unions' ability to undertake lawful industrial action. Secondary action, better known as 'sympathy strikes', was outlawed and picketing was restricted. Ballots were needed for official industrial action from 1984 and these had to be postal from 1993. Although unions have learned to use ballots as part of the negotiating process, they have imposed increasing financial costs, while the requirement to give employers seven days' notice further reduced unions' ability to respond quickly and potentially reduced the effectiveness of any action they took."
By the end of the seventies the pendulum was well and truly on the side of unions and the workforce. Did it then swing too far the other way? Possibly. Will it swing back? Given that no elected party has had this in a manifesto since then, unlikely for the forseeable future. Even the socialist (?) government with strong majorities between 1997-2010 wouldn't go there.
Should the TUC and/or individual unions (eg BALPA) campaign for a change in the law? Possibly, but my guess is that there is no political will in the parties that may form a government.
So....we are where we are, the laws on industrial action by uk workers and unions are very clear:
https://www.gov.uk/industrial-action-strikes
It can't be wished away, much as some would like to.