Philip had no direct part in the negotiations, Charles agreed to the majority of terms, which was favourable to England:
A son would inherit England and the Low countries (not Spain), and if the only surviving child was a daughter, she would inherit the same, Without heirs, or Mary dying before Philip, he nor his heirs would have any claim to the English throne. Philip would get the title ‘King’, rule as joint sovereign, couldn’t possess any sovereign authority in his own right. Couldn’t promote foreigners to hold office in England. Had to uphold the laws of England. Not allowed to take the Queen/any children out of the country without position from the nobility. England had to uphold the treaties of 1543 and 1546 with the Netherlands, stating England should come to the aid of the Netherlands with 6000 men if the provinces were invaded by the French.
Stop short of a full union between England and Spain. Power retained within England and Mary, not Philip. Philip get Title but not power. Preventing foreign takeover. Military alliance (1557 England in war with Spain against France)
Philip attempted to integrate himself into court life (Drinking beer, giving out pensions and gifts from his own private resources, as he didn’t have access to any English patronage)
Tensions - Joint household of Spanish entourage and English personnel appointed to him, Too many people for required duties, Some of his followers disgusted by lack of deference to him, At the wedding, the Queen’s throne was higher and more ornate than his, Anti-Spanish feeling in London
Mary married 12 months after taking throne, Philip spent more time abroad than in England