I want to open a Fashion shop in the high street to start my own business?

But I have only 拢16000 in my A/C any advice

The first thing you should do is go to the library and look for "free money" i.e. grants. Look at what options are out there and see what category you would fit into. Also, look into the different business organisations to see if they offer low interest loans.
The other thing you may want to consider is a small inventory and start by doing In-home shows - there is no overhead besides fuel and inventory, and you can build up your clientelle and bank account for the time you are ready to open your shop.

small business loan?

very high risk endeavour, you are competing with all the others. Get a business adviser!!!! Don't throw away your money without finding out all the information first. I live in a small town and have seen soooo many clothes shops open and close, it really hard to compete against huge high street retailers that can sell clothes incredibly cheap. The clothes shops in my town that have stayed open for years are all boutique type shops, not super expensive but not cheap, they cater to the 35+ age group who have lots of money. The other shops that seem to do well are the 25-35 age group shops that are again not cheap, they cater for people buying outfits for dressy occasions and quality casual wear. ALL the clothes shops that have tried to do the teenage cheap clothes have failed, they just can't compete with the big stores.

Do a business plan, thoroughly research the market to support your view that this is the right way to do it. Speak to a local business adviser (contact below or try business link).