These are the commonly requested tests

FBC, Full blood count

Usually a test for anaemia or infection.

ESR, CRP

Both are tests for inflammation in the blood. High readings commonly just mean a recent infection. Very high readings can mean severe arthritis, muscular rheumatism or some other important condition.

Blood Clotting (INR, PT, APTT)

These are usually tests for bruising or if you are on warfarin.

B12, Folate

Low levels of these vitamins can cause anaemia, nerve problems or memory problems.

Ferritin - Iron levels

Usually a test for anaemia or infection.

U+Es, Renal Function Tests

Theses are tests of the kidneys, often used to assess blood pressure treatment.

LFTs - Liver Function Tests

Tests of liver disease, but more usually done to assess whether or not some medicines (such as cholesterol treatments) are affecting the liver.

Glucose - Blood Sugar

This is the test for diabetes, and is usually a fasting blood test.

TFTs - Thyroid Function Tests

The thyroid glands help to control our energy levels. Low thyroid levels are a common cause of tiredness in the elderly.

Amylase

A test for the pancreas, used to investigate stomach pains.