Ultra-hot Jupiters (UHJs) have extreme atmospheres driven by intense stellar irradiation and tidally locked orbits, resulting in permanent, scorching, daysides (>2200 K) and significant day-to-night temperature gradients. UHJs are prime candidates for in-depth characterisation due to the detectability and chemical diversity of their atmospheres, composed of a vast array of atomic and ionic species with hundreds of narrow spectral features prominent in optical wavelengths. We will leverage the unique capabilities of GHOST, taking advantage of the high-resolution (>75,000) and broad wavelength coverage (363-1000nm) to perform a detailed survey of transiting UHJ atmospheres. We will comprehensively compare chemical and dynamical processes in the daysides and terminator regions of a broad sample of UHJs by observing orbital phases during their transits and near their eclipses. In particular, we will explore the 3D nature of UHJ atmospheres using phase-resolved detections in their transmission and emission spectra, and interpret the origin of such signals using general circulation models and atmospheric retrievals. These observations will provide the most sensitive optical view of UHJ atmospheres to date, and create a unique archive of data that will be invaluable as we prepare to further our knowledge with the advent of the ELTs in the next decade.