I was banned from Ireland for 5 years for deception in 2015. My husband (principal) and I want to apply for UK tourist visa this year 2019. I hope being banned from Ireland will not jeopardized our chances of getting visa to UK.
I’m afraid your hopes will be dashed because you will have to declare your ban in any UK visa application. UKVI takes previous travel history into account when assessing applications, a ban for deception makes it unlikely your application would be successful. In case it helps, you should be aware that the UK and Ireland share immigration data https://www.ein.org.uk/news/home-office-share-immigration-data-ireland-under-new-memorandum-understanding