Pour a mixture of 3 tablespoons vinegar and 2 tablespoons sugar over the drained (still in the colander) macaroni.
Drain the macaroni (again).
In a large bowl mix salad macaroni, peas, baby gherkins, celery, sweet onion, tuna, cubed cheese.
Dressing: Take the mayo, sugar, some vinegar, salt and pepper to taste; mix into the macaroni mixture. You may want to add more dressing.
This is a very forgiving salad. You can sub salad shrimp, ham or chicken for the tuna or ditch the meat/fish and add some grated carrots (if using carrots you might want to cut back on the sweet pickles), diced zucchini and diced red peppers.