"there was no any advice to leave the country, rather it was adviced to reapply with new photograohs.
anyhow i write too many times to home office but they always repeat there statement"
What do you mean? Did you reapply as they advised? If you did, you are unlikely to be classed as an overstayer because you would be entitled to stay whilst your application was considered. If you didn't take the exceedingly easy step of getting hold of some new photos you have no reason to feel hard done by.
Stop fooling around, get yourself a new passport from your embassy and go home.
actually i cannot reapply because of the following reasons.
1; i am not eligible to apply for psw because i dont have valid visa.
2; cannot re-apply because my qualification is older than 12 months ( u must need to have a degree within last 12 months).
thanks for ur kind help, now pls tell me would i face any problem while leaving from heathrow or when i will arrive islamabad pakistan.
pls tell me about any potential threat.