Warburton’s pedigree stretched back to twelfth century, when his forebears first acquired the Cheshire manor of the same name. His great-grandfather served as county sheriff, and married a niece of the 1st earl of Derby. By 1550 the family held four manors and land in over 20 parishes. However, Warburton’s father Peter received only a small share of this property, being a younger son. In around 1581 Peter, or his son and heir of the same name, was assessed for subsidy at just £6 in goods, suggesting that he enjoyed only minor gentry status.
Warburton was elected to the 1604 Parliament for Penryn, most likely through the intervention of Cecil, who exercised some influence over the borough through his relatives the Killigrews, the local patrons.
Shortly after the end of this session, Warburton finally and reluctantly took up his army commission. In early August 1604 he reported details of the siege of Sluys to Cecil, whom he asked to stand as godfather to his son as a token of his continuing favour. Warburton was granted this request, and duly named his heir Cecil, but his pleas barely a month later for promotion to marshal at Brill fell on deaf ears. In December 1605 he brought his patron news of Vere’s mission to The Hague, and thereafter remained in England despite Vere’s explicit request for his immediate return.
It is not clear whether Warburton was abroad at the start of the 1605-6 parliamentary session, as he does not appear by name in its records. In the third session he was nominated to four bill committees, one of which concerned the possessions of the 5th earl of Derby (3 June 1607). Another on 30 May dealt with the transfer to the Crown of the Cecil house of Theobalds, his patron’s principal residence. The others addressed breach of contract by sailors and abuses in the law courts (1 and 12 May).
In October 1607 Warburton secured full possession of the offices granted in reversion in 1604, having already ensured that they would pass in turn to his son. Although his fees as a gentleman pensioner then merited the relatively high subsidy tax assessment of £26, this income would cease when Warburton died, leaving his family heavily dependent on the profits from his various Duchy posts and an annual pension of 100 marks held by his wife in her own right. Accordingly, in a letter probably written on his deathbed, he requested one last favour from his old patron, now earl of Salisbury, who permitted him or his executor to raise an additional sum by selling his Brill commission.
