Wmc, no significance at all in a one sided problem, at least not in a sense that one side of your pelvis/lumbar spine is necessarily abnormal. We are all assymmetrical, some more than others. Spinal Protective responses are the ubiquitous element in our lives, the degree to which we are ultimately elert to them depends on a variety of factors , intrinsic and extrinsic.
Continuous mobilisation has been developed over twenty yearsof clinical practice, it's not difficult to learn, has a lot in common with other forms of Wikipedia reference-linkfacet joint manual therapies, such as Mulligan and Maitland methods. Most Aussie trained physios will be at least familiar with the latter. Unfortunately UK physiotherapytraining has historically been short on these therapies. It is possible that UK graduates from the past ten years may be more familiar with referred pain as a theme, but I wouldn't count on it.
Best of Luck.