A senior investigating officer in the case for West Midlands Police said they are disappointed with the length of the sentences.
Detective Inspector Sharon Naughton said they had been expecting longer.
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West Midlands Police said the trip was to show children they shouldn't be scared after the recent terror attacks in London and Manchester.
Bright or sunny intervals and a chance of isolated heavy showers until mid afternoon, when the showers will become more widespread.
Showers and longer spells of rain are likely throughout the day, though there will be some dry and bright spells too.