Welcome
@Tams CHC
Congratulations on quitting smoking and taking up Vaping!
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If you are interested and have time to read;
Blu Pro is a supermarket special. Morrisons, Co-op etc.
It's a tobacco company product which is expensive (read; very overpriced), not as good as Blu say (a bit dodgy) and generally designed to introduce people to vaping and make lots of money unless people swap to better and cheaper products.
Blu actually supported the TPD, which is EU legislation that is killing Vaping in May 2017, so I would plead with you not to carry on buying stuff for it and giving them your money.
If you don't know what the TPD is (Tobacco Products Directive) you need to know, as it's laws banning larger bottles of e-liquid, banning liquid over 20mg (some people need more than 20mg) and banning tanks over 2ml, all of which hands the market over to companies like Blu.
(Basically, enemies of vaping

)
The components of your Blu are available online for a lot less money from normal vaping shops.
I know this sounds really negative, but Blu are not friends of vapers or vaping. They are self-interested tobacco company who are determined to charge the absolute maximum for everything they sell.
They charge £4.99 for e-liquid. That's a price from 2012.
Last time I bought liquid, it was £1.70. UK-made too.
Their £4.99 tanks are £1.99 tanks...but of course, they don't want anybody to know that, as by the time they have sold you 10, they have taken £50 off you for £20 worth of products.
Sorry to break the bad news.
You can vape better, for cheaper and not support a tobacco company. I call that a win, win, win.