In the UK a higher percentage of people in ethnic groups live below the poverty line, but in real numbers there are many time more poor white people, as the UK is 90% white. That means that someone living in poverty in the UK has a 6 in 7 chance of being white.

Poorer areas might have worse health services, but people in those areas tend to also live more unhealthy lifestyles which is the realthat lifespans in those areas tend to be lower than more affluent areas.

Being poor isn't the reason people in these groups aren't getting vaccinated; it's out of choice driven by ignorance or fear; as it's free to be vaccinated. The groups your mention are often are less educated and have cultural conflicts with medical and scientific advice.

Many communities have willfully ignored public health advice simply because they think it doesn't apply to them.