"Needs" is unhelpfully not defined in English law but is absolutely central to financial outcomes on divorce or dissolution of a civil partnership. Needs invariably includes income (for self and for any children) accommodation (particularly accommodation for and with children), any relationship generated disadvantage or the recognition of sacrifices and commitments, short-terms items such as cars and furniture, possibly pension (dependent on age), and possibly capitalisation of future income needs. It is often based on the standard of living during the marriage or civil partnership if affordable. There may be other features in particular circumstances.
Needs-based claims are sometimes referred in EU law as "maintenance", but not to be confused with periodic payments of alimony, Spousal / Civil Partner maintenance.