In this paper we derive multivariable generalizations of Bailey's classical terminating very-well-poised ₁₀Ø₉ transformation. We work in the setting of multiple basic hypergeometric series very-well-poised on unitary groups U(n + 1). We obtain these U(n + 1) ₁₀Ø₉ transformations from an alternate form of our general U(n + 1) classical Bailey transform, and the U(n + 1) generalizations of Jackson's q-analog of Dougall's terminating ₇F₆(1) summation. One of these ₁₀Ø₉ transformations contains the U(n + 1) ₁₀Ø₉ transformation of Denis and Gustafson (1992) as a speci We also deduce a U(n + 1) extension of one of Sears ₄Ø₃ transformations. The classical case of all this work corresponds to U(2), or equivalently A₁.