The OP stated she has a £110 ($175 USD) budget for a microphone to use primarily with a DSLR, and you suggested an entry level USB podcasting mic. That is not a financial awareness issue, rather it is being unaware of appropriate microphone recommendations.
The Blue Snowball does not provide exceptional performance. It provides mediocre performance, substandard mounting ability due to the proprietary bracket and obtrusive oversized design for any use outside of a podcast. It is only potentially appropriate for those who have an extremely low budget and of course only when it is on sale. The Samson C01U can frequently be found in a similar price bracket ($50-$60) and is far superior in every way. In either case, a condenser is not in most cases the right choice for someone recording with a DSLR.
It is often offensive, but I stand behind my comment that the only people recommending the vast majority of Blue mics are people who don't have microphone experience. There is nothing wrong with people not being overly experienced in the tech of microphones, but far too much false positive information exists surrounding Blue mics in the YouTube scene.
Don't mistake any of this for ire or anger directed at you in any way. Microphones are my thing and I unfortunately spend a great deal of time attempting to help filter out incorrect information on this forum in that regard.