Miners had a good start to the week and boosted the blue chip index amid rallying oil prices continued to rise.
The FTSE 100 closed 1.5% higher at 6,812.
Anglo American (AAL), Glencore (GLEN) and Fresnillo (FRES) gained up to 6.2%.
BHP Billiton (BLT) and Rio Tinto (RIO) were also in positive territory.
West Texas Intermediate (WTI) crude oil jumped 2.4% to $44 and Brent crude oil was 2.3% higher at $46.84 per barrel, respectively.
Copper slid 0.3% to $4,740 per tonne.
MID CAP RISERS AND FALLERS
A profit warning sent outsourcing giant Mitie (MTO) spiralling 28.6% to 191.9p. It blamed the trading shortfall on 'uncertainty both pre and post the EU referendum'. It said operating profit is expected to be below management's expectations due to a reduction project work volumes and spending by clients as well as pricing and cost pressure.
Russia-based precious metals producer Polymetal (POLY) said the content of precious metals was estimated at 6.6 million ounces at its Viksha deposit, making it one of the largest open-pittable PGM resources in the world. Shares were up 2.3% to £10.35.
Food producer Dairy Crest (DCG) declined 6.3% despite revealing that first-half profit will beat expectations. The firm maintained full-guidance despite the improved second quarter performance from key brands Cathedral City, Country Life, Clover and Frylight.
SMALL CAP RISERS AND FALLERS
Clontarf (CLON) and its partners accepted an offer in principle concerning the revised Tano Basin acreage co-ordinated by Ghanaian officials, causing the share price to rise 13% to 0.65p.
Software firm Adgorithms (ADGO) plummeted 17.3% to 21.5p after its gross profit nearly halved from $4.2 million in the first half to $2.2 million, as R&D expenses rose by $1 million.
Online gaming operator Stride Gaming (STR) traded 13.8% higher on a strong trading update, which revealed it will beat expectations as a result of strong organic growth and a significant jump in full year revenue.
Managed services provider Maintel (MAI) disappointed investors after trading, excluding Azzurri, was slower than expected due to delays in the timing of four large contracts. Shares in the firm dropped 11.9%.
Manchester-based stockbroker W.H. Ireland (WHI) soared 26.2% to 127.5p after confirming that Kuwaiti European Holdings (KEH) is considering taking a stake in the firm.
Indian infrastructure group Skil Ports & Logistics (SPL) crashed 43.6% to 11p after announcing it needs to raise £36 million to finish its port terminal, this sum is considerably larger than its £4.18 million market cap.
Aviation services provider Gama Aviation (GMAA) fell 10% on half-year results after analysts reduced earnings forecasts amid weaker European market conditions. The company said it expects a stronger second-half performance.