The study of the cosmos has been extensively advanced by measurements of CMB temperature anisotropy with unprecedented sensitivity and polarisation anisotropy with moderate sensitivity in the last three decades. In the next decades, CMB polarisation anisotropy will be measured with high sensitivity with experiments like LiteBIRD, QUIJOTE, SO, CMB-S4, and ECHO (CMB-Bharat). The primary scientific objective of the experiments is primordial B-mode measurement with the exploration of new sciences e.g., Cosmic Birefringence, anisotropic spectral distortion measurements etc. CMB temperature anisotropies will also be measured with more sensitivity than Planck which will advance understanding of other scientific studies e.g., mapping of hot gas of the Universe (tSZ). I will discuss recent forecasts of these scientific targets using LiteBIRD in presence of foreground complexities. The QUIJOTE is a ground-based experiment for the study of low-frequency CMB foregrounds. I will discuss the low-frequency CMB foreground (synchrotron) study using QUIJOTE. Finally, I will present recent studies on a more ambitious CMB space mission, CMB-Bharat for the measurement of B-mode CMB polarisation.