We use high-resolution HI data from the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) to study the HI and angular momentum properties of a sample of 114 late-type galaxies. We explore the specific baryonic angular momentum-baryonic mass (j_b_-M_b_) relation, and find that an unbroken power law of the form j_b_{prop.to}M_b_^0.55+/-0.02^ fits the data well, with an intrinsic scatter of ~0.13+/-0.01dex. We revisit the relation between the atomic gas fraction, f_atm_, and the integrated atomic stability parameter q (the f_atm_-q relation), originally introduced by Obreschkow et al. (2016ApJ...824L..26O), and probe this parameter space by populating it with galaxies from different environments, in order to study the influence of the environment on their j_b_, f_atm_, and q values. We find evidence that galaxies with close neighbours show a larger intrinsic scatter about the f_atm_-q relation compared to galaxies without close neighbours. We also find enhanced star formation rate among the deviating galaxies with close neighbours. In addition, we use the bulge-to-total (B/T) ratio as a morphology proxy, and find a general trend of decreasing B/T values with increasing disc stability and HI fraction in the f_atm_-q plane, indicating a fundamental link between mass, specific angular momentum, gas fraction, and morphology of galaxies.

Cone search capability for table J/MNRAS/496/2516/tablea1 (The galaxy sample)