United Airlines' Basic Economy passengers are allowed to bring one personal item on board, such as a purse or small backpack, that must fit under the seat in front of them. However, they are not permitted to bring a full-sized carry-on bag into the cabin unless they are a MileagePlus Premier member, primary cardmember of a qualifying MileagePlus credit card, or Star Alliance Gold member. If Basic Economy passengers bring a full-sized carry-on bag to the gate, it will be checked and a fee will be charged. **

A removable retainer, also known as a loose retainer, is a dental appliance that is custom-made to fit the shape of the patient's mouth and teeth. It is typically made of plastic or a combination of plastic and metal wires. The purpose of a removable retainer is to maintain the position of the teeth after orthodontic treatment, such as braces, and prevent them from shifting back to their original position. Patients can take the retainer out for eating, brushing, and flossing, but it should be worn as directed by their orthodontist to ensure the best results. **

The United Kingdom is still technically united, as it consists of four constituent countries: England, Scotland, Wales, and Northern Ireland. However, there have been growing tensions and calls for independence in Scotland and Northern Ireland in recent years. The Brexit vote also highlighted divisions within the UK, with Scotland and Northern Ireland voting to remain in the EU while England and Wales voted to leave. The issue of unity within the UK remains a topic of debate and concern. **

The term "retainer" can refer to different things depending on the context. It could be a fee paid in advance to secure the services of a professional, such as a lawyer or consultant. It could also refer to a dental device used to maintain the position of teeth after orthodontic treatment. To provide a more specific answer, please provide additional information or clarify the context in which you are referring to a retainer. **

No, the United Kingdom is not a federal state. It is a unitary state, meaning that the power is concentrated in the central government in London. The UK is made up of four countries - England, Scotland, Wales, and Northern Ireland - each with its own devolved government, but these governments do not have the same level of power as states in a federal system. **

The ECB can contain inflation through a restrictive monetary policy by increasing interest rates. Higher interest rates make borrowing more expensive, which can reduce consumer spending and investment, ultimately slowing down economic growth and inflation. Additionally, the ECB can reduce the money supply by selling government securities, which can also help to curb inflationary pressures. By implementing these measures, the ECB can effectively control inflation and maintain price stability in the economy. **

United Airlines' policy for excess baggage varies depending on the route and class of service. For domestic flights within the United States, the fee for the first and second checked bag is $35 each, and the fee for any additional bags is $150 each. For international flights, the fees for excess baggage also vary based on the destination and class of service. It is recommended to check United Airlines' website or contact their customer service for specific details on excess baggage fees for a particular flight. **

No, England is not a federal state in the United Kingdom. The United Kingdom is a unitary state, meaning that power is concentrated in the central government in Westminster. While Scotland, Wales, and Northern Ireland have varying degrees of devolved powers, England does not have its own separate parliament or government like the other nations within the UK. **