The House of Lords European Union select committee says in a report on Brexit's impact on financial services published on Thursday: "We were told that much of the business lost by the
The committee highlighted the fact that New York already has a highly evolved finance "ecosystem," second only to London, and says businesses feel it would be easier to become part of New York's scene than try to replicate a rival ecosystem in a city like Paris, Frankfurt, or Dublin.
The difficulties in replicating London's unique financial services system could also be used as a bargaining tool, the committee suggests.
"Repatriation could happen. But the difficulties associated with replicating the services currently provided in the UK give us some hope that a deal might be reached that would be in the mutual economic interest of both the UK and the EU."
The downside of such complexity is that it is very hard for the government to predict the likely impact of possible Brexit-related changes, the report says.
"The interconnectedness of the UK financial system presents serious difficulties for firms and the Government in determining the impact of changes to the relationship between the EU and the UK," the committee writes. Like a game of Jenga, move one wrong piece and the whole thing could come crashing down.
The Lords say that avoiding disruption to financial services must be "a high priority" in Brexit negotiations, warning that businesses need certainty otherwise may relocate thousands of jobs elsewhere. The report calls for the government to agree a transition deal to ease the process of Brexit for the City, a conclusion already trailed in the press earlier this week.
The report says: "We find that a key priority will be to ensure that there is an adequate transition period, avoiding a 'cliff edge' both at the moment of withdrawal following the Article 50 process and as the UK and the EU move towards a new relationship."
The Lords committee also says that "maintaining appropriate labour market flexibility will be critical to the UK's long-term economic prosperity."