There are many countries that do apply the conditions of being able to enter the country so they must have a visa, the UK is one of them. So, all you have to do first is to do an English language test so you can get the visa. Visit britishlifeskills.com to take an English test and get a visa.
Unfortunately, there are still some people whose visa applications are rejected. Some embassies, especially European countries also require applicants to provide proof of hotel bookings as one of the conditions for applying for a visa. Make sure the hotel for all your day trips has been booked and there is no one day that has no proof of lodging.
If you rent an apartment, ask your host to provide formal booking proof so that you can use it to apply for a visa. While if you stay at a friend or relative’s house, your friend or relative must send a sponsor letter stating that they will accommodate you during your trip period.