Yes.
Laos has a higher temperature than the UK.
Yes, Germany is larger than the UK. Germany is about 357,168 square kilometres, while the UK is about 242,495 square kilometres.
The UK receives more rain than the desert due to differences in atmospheric pressure systems and proximity to bodies of water. The UK's location and prevailing westerly winds from the Atlantic Ocean bring moisture-laden air, resulting in more rainfall. Deserts, on the other hand, are often located in regions with high pressure systems that inhibit the formation of clouds and precipitation.
Your sink drainage (let's call the waste pipe from here 'A') and bath drainage (B) are probably linked together, meeting in one waste pipe (C) before flowing on to the mains drainage (D). A should be higher than B, which is higher than C, which is higher than D, so when you drain the sink or bath, water should flow directly to the mains drain. If there is a blockage in C (or possibly a narrower waste pipe than it should have), the water will drain slower than it should. When you drain the sink, the blockage in C will cause the whole system in A and B to fill up, and because A is higher than B, the water pressure will cause water to flow backwards through B, and enter the bath. You need to either clear the blockage in C, or if the waste pipe is too narrow, it should be replaced with a pipe of the correct size (in the UK, this should be 40mm diameter).
There are many waterfalls in the UK. The more mountainous regions have the higher falls. An example would be Aber Falls in North Wales.
The average elevation above sea level is a lot higher for the UK than for Bangladesh, making UK a lot less exposed. In the event of flooding, fewer UK citizens will be hit, and won't need to move that far to get away from the water. On top of that, UK is a wealthier country, with a lot more resources that can be used to rescue and house those affected by the floods.
30 litres per minute
Over 7000 pressure groups are thought to operate in the UK.
Because wind levels are higher there than most other parts of the UK.
The average person in the UK makes around 42,000 dollars a year. This is higher than the US national average income.
Because the population is much higher in the south.
UK wire gauge - the higher the number the thinner the wire. So 25 would be thinner than 22.