Hi Pearl,
You are on a relatively inflexible insulin routine. You can't vary it. What I will say is that you should keep to the injections every 8-12 hours as you do now but OMIT the dose if the timing between breakfast and evening meal is shorter than this interval.
All the time zone insulin advice does not work for the biphasic routines so you don't need to look at the usual advice. Most sites assume you are on an MDI regime. What would help is advice from any other people who have gone across the pond on the same regime. My son Steven was on biphasic but by the time we went to Canada he was on the multiple daily injections.