Русско-англо-русский юридический словарь

You certainly do not have to agree to change the completion date to suit your buyers, but if you do, it is very important you tell your solicitor so he can then vary the contract formally.

Ideally, your solicitor should prepare a supplemental agreement changing the completion date and your buyers should pay your solicitor's costs for drafting it. Both you and the buyers will need to sign the supplemental agreement.

Annual leave is paid time off work granted by employers to employees to be used for whatever the employee wishes. Depending on the employer's policies, differing number of days may be offered, and the employee may be required to give a certain amount of advance notice, may have to coordinate with the employer to be sure that staffing is adequately covered during the employee's absence, and other requirements may have to be met. It is considered a benefit for the employees. (Wikipedia)

Internet shoppers will not have to pay customs duty on items they have bought for less than £105 from outside the EU. (BBC News)

If you own a business, you will have to enter into many contracts with vendors, customers and other parties. A business contract is a legally binding agreement between two parties, usually for the provision of goods and services or both. (findlaw.co.uk)