So given we need immigration, one suggestion is that maybe Reform voters would implement a system more like the Swiss? I looked up the stats for Switzerland...
Their foreign population is 65–75% European especially from Portugal, Italy, Germany, France and Spain. Also significant numbers from UK, Austria and Poland with some from Kosovo, Serbia, North Macedonia. (Switzerland has free movement agreement with the EU.)
Non-European migrants make up the remaining 25-35% of the foreign population including Turkey, Eritrea (notable refugee group), India, China and the United States. These are workers in finance, pharma and tech plus asylum seekers and students.
The irony though. Swiss immigration is clearly more EU based, if that would be more palatable to Reform voters, then to reconfigure the system, Reform would replace non-EU immigration with EU, thereby reversing their own Brexit shift .