The plaintiff purports to appeal under SJ.C. Rule 2:21, 421 Mass. 1303 (1995), to the full court from a single justice’s denial of relief sought under G. L. c. 211, § 3 (1994 ed.). If we assume, without deciding, that the document submitted by the plaintiff met his filing responsibility under rule 2:21, we conclude that he has not made the requisite showing that review on appeal (or other available means) of the trial court decision would not be adequate.

Judgment affirmed.