200-250, your budget is quite tight.

Try the Marathon shop at lot10, they got plenty of shoes and some with good discounts.

RM200-250 can probably get a good Brooks shoes, quite nice for running and affordable.

What's your preference for a shoe? Soft & bouncy? Tight fit?

Always get shoe size + 1 (if normally you're getting 7.5 uk, try go up to 8.0/8.5uk) cause the toes will swell after long runs.

Get the shoes for running, don't be like some newbie that wear 'sport shoes' for running. End up foot hurt and bad form.