Geoff Collier said:
I was in Hull at the time and voted for Pauline Stanton, the Socialist Unity candidate. I think the official line was that the campaign was pointless but we weren't discouraged from voting for her. I seem to remember we also helped with security at a couple of public meetings too.
Ian Birchall, Building "The Smallest Mass Party in the World" (sic), 1981, puts it as follows:
"ANOTHER factor in the development of the organisation was the decision,. in the autumn of 1976, that IS should begin to contest parliamentary by-elections. The first seat chosen was Walsall North, the constituency vacated by runaway Labour MP John Stonehouse. The objective was twofold: firstly, to offer a generalised political alternative to a small layer of people looking for something to the left of the increasingly discredited Labour Government: secondly, to use the opportunity for propaganda to build a local branch of the organisation. The results at Walsall, while not startlingly good, seemed to suggest some validity to this perspective: 1.6% of the poll (more than the Communist Party had got in that seat in October 1974), and some twenty five recruits to the party.
It was on the basis of these developments that the decision was taken that from January 1977 IS should be renamed the Socialist Workers Party.
... by early 1978 it was clear that the electoral strategy had, on balance, been unsuccessful. A total of eight by-elections was contested. In all cases the vote was, as expected, small; but the intervention of the IMG (under the electoral guise of ‘Socialist Unity’) and other far left groups meant that the results were in some cases much worse than expected; moreover, experience showed that it was difficult to maintain those branches built around an election campaign.
The original intention of standing some sixty candidates in the General Election was dropped, and it was finally agreed not to stand any candidates at all. While some experience had been gained, and the possibility of fighting elections in the future remains, the experiment had in general proved negative.
...
The SWP was also approached by the IMG for co-operation in an electoral alliance. The response to this was that at the present time electoral interventions could be only a matter of propaganda, and that united fronts can be fruitful if they are based on specific and concrete demands, not abstract propaganda."