GSK2269557 is a potent and highly selective inhaled Phosphoinositide 3-Kinase delta inhibitor being developed as an anti-inflammatory and anti-infective agent for the treatment of inflammatory airway diseases. The study will be conducted at a single centre and in 3 Parts. The aim of Part A and B of the study are to assess the safety, tolerability and pharmacokinetics (PK) single and repeat doses of a new formulation of GSK2269557 administered via the ELLIPTA dry powder inhaler (DPI) to healthy subjects. This is the first study in which GSK2269557 will be administered via the ELLIPTA DPI. Part C of the study will investigate the proportion of the systemic exposure that post inhalation is due to the swallowed fraction of the inhaled dose. Part C will also be conducted using the ELLIPTA device and magnesium stearate formulation. Part A will be conducted first. Part B and Part C may be run sequentially or in parallel. Part A is a randomized, double blind, placebo controlled, single dose, dose escalating incomplete block 2-period crossover study in healthy subjects. Subjects will be randomized to receive either one dose strength of GSK2269557 and placebo utilizing placebo replacement, or will receive both active dose strengths. Part B is a randomized, double blind, placebo controlled, repeat dose study in healthy Subjects. Subjects will be randomized to receive either repeat doses of GSK2269557 or placebo for 10 days. Part C is a, randomized, open-label, crossover design to assess the systemic exposure of single doses of GSK2269557 administered via the ELLIPTA DPI to healthy subjects, with and without ingestion of activated charcoal. ELLIPTA is the registered trademark of GlaxoSmithKline groups of companies.