* FTSE 100 up 1 pct
* Mining stocks recover
* Global trade tensions ease
* Glencore suspends Rusal-EN+ share swap (Updates prices)
LONDON, April 10 (Reuters) - Recovering mining stocks boosted Britain's top share index to its highest in six weeks on Tuesday, as concerns around global trade continued to ease.
The blue-chip FTSE 100 index was up 1 percent at 7,266.75 points at the close, with mid-caps also up 1 percent.
Energy and materials sectors drove gains as easing concerns over global trade underpinned commodities prices.
Royal Dutch Shell and BP rose 1.3 to 1.6 percent, adding 17 points to the index as oil broke above $70 a barrel.
Miners recovered following some large losses in the previous session when stocks with exposure to Russia were hit after the United States unveiled new sanctions on Russian officials, oligarchs and their companies.
Glencore rose 2 percent after the mining giant suspended a deal to swap its shares in Russian aluminium producer Rusal for Global Depository Receipts in EN+ due to the sanctions.
Both Rusal and EN+ were targeted by the U.S. measures.
"Glencore shares were hit, but we think that the market has overreacted in a worst-case scenario the foregone business from Rusal volumes is worth around 0.9 percent of 2018 (estimated) EBITDA, whilst if the Rusal stake on the balance sheet ($933m) is worth zero, this would be around 1.3 percent of Friday's market cap," wrote Bernstein mining analyst Paul Gait in a note.
Miners Anglo American, Antofagasta, BHP Billiton, Rio Tinto gained. Sanctions on Rusal boosted aluminium prices to a more than six-week high.
EN+ shares rose 7 percent but were nowhere near recovering their dramatic losses. The stock has halved in value since Friday's open.
Shares in Evraz, a Russian steel producer which plunged 14.5 percent in the previous session, also recovered slightly to trade 1.1 percent higher.
FTSE 250 miners Polymetal International and Ferrexpo gained 7.1 percent and 5.6 percent.
Last week risky assets were hit by an escalation in tensions between the United States and China, with investors worried that the tariffs would leads to a full-blown trade war.
However, a promise from Chinese President Xi Jinping to lower import tariffs on products such as cars helped soothe market nerves.
"President Xis speech overnight appears to have struck the right tone, providing some relief for investors who have been buffeted by the recent war of words between Trump and China over trade," said Rebecca O'Keefe, head of investment at Interactive Investor.
Elsewhere, shares in Burberry rose 1.4 percent, buoyed by a well-received first quarter sales update from French luxury peer LVMH.
The utilities and consumer staples stocks that investors had rushed into during market stress fell back. United Utilities , Severn Trent and National Grid lost between 1 and 2.9 percent.
National Grid said it expected low demand for electricity this summer.
British greeting card retailer Card Factory topped the gainers among mid cap stocks, its shares jumping 12.6 percent after reporting a rise in annual sales and saying it plans to declare a special dividend in September.
(Reporting by Kit Rees and Helen Reid Editing by Robin Pomeroy)