reinstatement to your old job;
re-engagement (that is, re-employment in a job comparable to the one from which you were dismissed); or
financial compensation (this is capped, except in a few specific scenarios, such as where you are dismissed for reporting health and safety concerns).
Financial compensation for a claim for unfair dismissal is generally not high, especially when you take into account the risks and costs (financial as well as emotional) of bringing a claim. The median tribunal award in 2018–2019 for unfair dismissal was just £6,243.
A tribunal will only recommend reinstatement or re-engagement if you want them to do so, but even then it is rarely ordered. It is more common for the tribunal to order the employer to pay compensation instead.
Even though tribunals do not order reinstatement very often, it is still worthwhile asking for this remedy if it is the outcome that you want. If the tribunal orders reinstatement and the employer fails to comply, the tribunal can order further compensation to be paid.