Upvote:5
Short answer:
No problem having no "formal" savings account
I had submitted two bank account statements when I applied for my UK visa recently, both of which were not a "formal" savings account, and had it written like CHECKING or CURRENT account, do not remember exactly. I used them for similar purposes: salary, expenses and savings (in an informal sense like you say). However, when I submitted both, I made sure I had everything crystal clear for them to evaluate.
For every cash inflow from employer or any other friend (for expense sharing like restaurants, trips) or my previous apartment which refunded me my caution deposit or cash outflow (like rent, mobile bills, online shopping), I had them clear in the description what this relevant transaction was about, and from/to whom.
I got my visa!
Read more about bank statements for the UK visa here:
Should I submit bank statements when applying for a UK Visa? What do they say about me?