In his capacity he garners support of his party colleagues on various issues and has his way. The whole system of Government is under his control and he is the real Executive. He is the chairman of the Cabinet which itself is formed on his advice.
Apart from these provisions, the practical politics of the day have increased his discretion. The growing instrumentality of government and measures like delegated legislation has also enhanced the power of the executive.
There have been instances when the Prime Minister’s office resembled the U.S. President’s executive office.
However, the politics of coalition, federalized political party, effective opposition and mass media have increasingly transferred the aura of PM’s office. He now has to work under a lot of pull and pressure and even resort to accommodation and compromise for survival of the Government.
In England the Prime Minister wields a lot of influence because of the disciplined two party systems which either forms the government or remains in opposition.
On the contrary, Indian polity has been a federal one with a lot of strong regional political parties paving way for era of coalition. And, this trend is likely to survive for some time.